Unable to biuld nopCommerce 4 in VS17 community

when I build nopcommerce 4 in VS17 community it shows 689 errors. I waste my whole day on it. please help if any body know the fix.
error are 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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Caching\MemoryCacheManager.cs  6  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\IEngine.cs  4  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\IEngine.cs  27  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\INopStartup.cs  2  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\INopStartup.cs  17  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\NopEngine.cs  10  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\NopEngine.cs  12  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\Infrastructure\NopEngine.cs  180  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\WebHelper.cs  9  N/A
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\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\WebHelper.cs  10  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Data  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Services  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Services  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Web.Framework  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Web.Framework  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Web.Framework  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Tests  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Tests\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Web  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Web  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Web  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Web  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Core.Tests  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Core.Tests\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Tests\bin\Debug\net461\Nop.Tests.dll' could not be found  Nop.Core.Tests  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Core.Tests\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Data.Tests  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Data.Tests\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Data.Tests  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Data.Tests\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Tests\bin\Debug\net461\Nop.Tests.dll' could not be found  Nop.Data.Tests  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Tests\Nop.Data.Tests\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.DiscountRules.CustomerRoles  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.ExchangeRate.EcbExchange  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.ExchangeRate.EcbExchange  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.ExchangeRate.EcbExchange  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.ExternalAuth.Facebook  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExternalAuth.Facebook\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.CheckMoneyOrder  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Manual\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Manual\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Manual\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.Manual  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Manual\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.PayPalDirect  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalDirect\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.PayPalStandard  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalStandard\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.Square  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web\bin\Debug\net461\Nop.Web.exe' could not be found  Nop.Plugin.Payments.Square  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web\bin\Debug\net461\Nop.Web.exe' could not be found  Nop.Plugin.Payments.Worldpay  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Pickup.PickupInStore  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Pickup.PickupInStore\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Shipping.Fedex  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.Fedex\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Shipping.FixedOrByWeight  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Shipping.UPS  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.UPS\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Tax.FixedOrByCountryStateZip  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Widgets.GoogleAnalytics  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.GoogleAnalytics\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Widgets.GoogleAnalytics  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.GoogleAnalytics\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Widgets.GoogleAnalytics  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.GoogleAnalytics\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\bin\Debug\net461\Nop.Web.Framework.dll' could not be found  Nop.Plugin.Widgets.GoogleAnalytics  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.GoogleAnalytics\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Core\bin\Debug\net461\Nop.Core.dll' could not be found  Nop.Plugin.Widgets.NivoSlider  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.NivoSlider\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Data\bin\Debug\net461\Nop.Data.dll' could not be found  Nop.Plugin.Widgets.NivoSlider  C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.NivoSlider\CSC  1  N/A
Error  CS0006  Metadata file 'C:\Users\AM com\Downloads\nopCommerce_4.00_Source\Libraries\Nop.Services\bin\Debug\net461\Nop.Services.dll' could not be found  Nop.Plugin.Widgets.NivoSli

Please don't duplicate forum post.

We as nop community should follow standards.

You can find same post here.

Did you check system requirement if not than go through.

http://docs.nopcommerce.com/pages/viewpage.action?pageId=10256757

I'm still facing this issue. you have any solution?
thans

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:.

Glad to know you found cause of problem.