can't build project... nopcommerce 4.0 in VS2017

Hello NopTeam!
   i can't build nopCommerce 4.0 in Visual Studio 2017...
All Built Test failed..
and all dll has compatibility issue..
how do i fix this?
.........................
                        .
The list of error Below .
                        .
.........................

Severity  Code  Description  Project  File  Line  Suppression State
Error  CS0234  The type or namespace name 'Primitives' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Caching\MemoryCacheManager.cs  6  Active
Error  CS0234  The type or namespace name 'Configuration' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\IEngine.cs  4  Active
Error  CS0246  The type or namespace name 'IConfigurationRoot' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\IEngine.cs  27  Active
Error  CS0234  The type or namespace name 'Configuration' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\INopStartup.cs  2  Active
Error  CS0246  The type or namespace name 'IConfigurationRoot' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\INopStartup.cs  17  Active
Error  CS0234  The type or namespace name 'Hosting' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\NopEngine.cs  10  Active
Error  CS0234  The type or namespace name 'Configuration' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\NopEngine.cs  12  Active
Error  CS0246  The type or namespace name 'IConfigurationRoot' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\Infrastructure\NopEngine.cs  180  Active
Error  CS0234  The type or namespace name 'StaticFiles' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\WebHelper.cs  9  Active
Error  CS0234  The type or namespace name 'Primitives' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\WebHelper.cs  10  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Data  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Services  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Services  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Web.Framework  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Web.Framework  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Web.Framework  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Tests  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Tests\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Web  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Web  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Web  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Web  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Core.Tests  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Core.Tests\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Tests\bin\Debug\net461\Nop.Tests.dll' could not be found  Nop.Core.Tests  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Core.Tests\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Data.Tests  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Data.Tests\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Data.Tests  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Data.Tests\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Tests\bin\Debug\net461\Nop.Tests.dll' could not be found  Nop.Data.Tests  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Tests\Nop.Data.Tests\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.ExchangeRate.EcbExchange  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.ExchangeRate.EcbExchange  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.ExchangeRate.EcbExchange  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Manual\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Manual\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Manual\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Manual\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Square\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Square\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Square\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web\bin\Debug\net461\Nop.Web.exe' could not be found  Nop.Plugin.Payments.Square  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Square\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Square\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web\bin\Debug\net461\Nop.Web.exe' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\height\Documents\Visual Studio 2017\Projects\nopcom\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop

make sure you have .net core 2.0 SDK installed. Run the installer and double check that VS has it installed.

I also can't build the solution. And I have downloaded the .net core 2.0 SDK.  I am Using vs 2017


Severity  Code  Description  Project  File  Line  Suppression State
Error  CS0234  The type or namespace name 'Primitives' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  10  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Data  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Data\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Services  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Services\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Web.Framework  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web.Framework\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Web  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Services  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Services\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Web.Framework  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web.Framework\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Web  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Web.Framework  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web.Framework\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Web  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web\CSC  1  Active
Error  CS0006  Metadata file 'C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Web  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Presentation\Nop.Web\CSC  1  Active
Error    One or more packages are incompatible with .NETFramework,Version=v4.6.1 (win7-x86).        
Error    One or more packages are incompatible with .NETFramework,Version=v4.6.1.        
Error    Package AutoMapper.Extensions.Microsoft.DependencyInjection 3.1.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package AutoMapper.Extensions.Microsoft.DependencyInjection 3.1.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package AutoMapper.Extensions.Microsoft.DependencyInjection 3.1.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package AutoMapper.Extensions.Microsoft.DependencyInjection 3.1.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Authentication 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Authentication 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication.Cookies 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Authentication.Cookies 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication.Cookies 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Authentication.Cookies 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication.Facebook 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Authentication.Facebook 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication.OAuth 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Authentication.OAuth 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Authentication.OAuth 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Authentication.OAuth 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.DataProtection.Redis 0.3.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.DataProtection.Redis 0.3.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.DataProtection.Redis 0.3.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.DataProtection.Redis 0.3.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Diagnostics 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Diagnostics 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Diagnostics 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Diagnostics 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Hosting.Abstractions 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Hosting.Abstractions 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Hosting.Abstractions 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Hosting.Abstractions 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Http 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Http 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Http 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Http 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Http.Extensions 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Http.Extensions 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Http.Extensions 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Http.Extensions 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Mvc 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Mvc 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Mvc 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Mvc 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Routing 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Routing 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Routing 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Routing 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Session 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.Session 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.Session 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.Session 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.StaticFiles 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.AspNetCore.StaticFiles 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.AspNetCore.StaticFiles 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.AspNetCore.StaticFiles 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Caching.Memory 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.Caching.Memory 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Caching.Memory 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.Caching.Memory 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Configuration 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.Configuration 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Configuration 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.Configuration 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Configuration.Binder 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.Configuration.Binder 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Configuration.Binder 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.Configuration.Binder 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.DependencyInjection 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.DependencyInjection 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.DependencyInjection 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.DependencyInjection 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Abstractions 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.FileProviders.Abstractions 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Abstractions 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.FileProviders.Abstractions 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Composite 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.FileProviders.Composite 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Composite 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.FileProviders.Composite 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Embedded 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.FileProviders.Embedded 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Embedded 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.FileProviders.Embedded 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Physical 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.FileProviders.Physical 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.FileProviders.Physical 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.FileProviders.Physical 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Options 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.Options 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Options 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.Options 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Primitives 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1) / win7-x86. Package Microsoft.Extensions.Primitives 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error    Package Microsoft.Extensions.Primitives 2.0.0 is not compatible with net461 (.NETFramework,Version=v4.6.1). Package Microsoft.Extensions.Primitives 2.0.0 supports: netstandard2.0 (.NETStandard,Version=v2.0)        
Error  CS0103  The name 'StringValues' does not exist in the current context  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  145  Active
Error  CS0103  The name 'StringValues' does not exist in the current context  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  229  Active
Error  CS0103  The name 'StringValues' does not exist in the current context  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  493  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  116  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  116  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  144  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  144  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  209  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  209  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  213  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  213  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  228  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  228  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  493  Active
Error  CS0012  The type 'StringValues' is defined in an assembly that is not referenced. You must add a reference to assembly 'Microsoft.Extensions.Primitives, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  496  Active
Error  CS0234  The type or namespace name 'Configuration' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\IEngine.cs  4  Active
Error  CS0234  The type or namespace name 'Configuration' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\INopStartup.cs  2  Active
Error  CS0234  The type or namespace name 'Configuration' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\NopEngine.cs  12  Active
Error  CS0246  The type or namespace name 'FileExtensionContentTypeProvider' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  315  Active
Error  CS0234  The type or namespace name 'Hosting' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\NopEngine.cs  10  Active
Error  CS0246  The type or namespace name 'IConfigurationRoot' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\IEngine.cs  27  Active
Error  CS0246  The type or namespace name 'IConfigurationRoot' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\INopStartup.cs  17  Active
Error  CS0246  The type or namespace name 'IConfigurationRoot' could not be found (are you missing a using directive or an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Infrastructure\NopEngine.cs  180  Active
Error  CS0234  The type or namespace name 'Primitives' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\Caching\MemoryCacheManager.cs  6  Active
Error  CS0234  The type or namespace name 'Primitives' does not exist in the namespace 'Microsoft.Extensions' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  10  Active
Error  CS0234  The type or namespace name 'StaticFiles' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  9  Active
Error  CS0234  The type or namespace name 'StaticFiles' does not exist in the namespace 'Microsoft.AspNetCore' (are you missing an assembly reference?)  Nop.Core  C:\Users\XXXXXXXXX\Documents\Visual Studio 2017\Projects\nopCommerce4.0\Libraries\Nop.Core\WebHelper.cs  9  Active

kmaier2 wrote:


Make sure you vs2017 support .net core2 project. If not update your vs2017. To make sure that your vs2017 support .net core2 you can try to create a web new project from vs2017 like the bellow image
https://ibb.co/j6sgiR

It would be better to check your visual studio installation once again and confirm that you have installed .Net core components as well.

Useful link:
https://www.visualstudio.com/thank-you-downloading-visual-studio/?sku=Community&rel=15&utm_medium=clickbutton&utm_campaign=tailored_getStartDotNetCore&rid=34357&utm_source=dotnet1619110858.1490275674&dotnetid=1619110858.1490275674

same problem here!!!!

thanx
my problem is solved by updating vs17 to version 15.6.2
from here:
https://www.visualstudio.com/thank-you-downloading-visual-studio/?sku=Community&rel=15&utm_medium=clickbutton&utm_campaign=tailored_getStartDotNetCore&rid=34357&utm_source=dotnet1619110858.1490275674&dotnetid=1619110858.1490275674

.

nam.bash wrote:


Awesome! I have resolved the issue with this way.

Thanks.