Can't open nopCommerce source code in VS 2013

I can't open source code in VS 2013
Please help me! Thank you!

The list of error below.

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D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Presentation\Nop.Web\Nop.Web.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Presentation\Nop.Web\Nop.Web.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Libraries\Nop.Core\Nop.Core.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Libraries\Nop.Core\Nop.Core.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Libraries\Nop.Data\Nop.Data.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Libraries\Nop.Data\Nop.Data.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Libraries\Nop.Services\Nop.Services.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Libraries\Nop.Services\Nop.Services.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Data.Tests\Nop.Data.Tests.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Data.Tests\Nop.Data.Tests.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Services.Tests\Nop.Services.Tests.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Services.Tests\Nop.Services.Tests.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Core.Tests\Nop.Core.Tests.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Core.Tests\Nop.Core.Tests.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Tests\Nop.Tests.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Tests\Nop.Tests.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Web.MVC.Tests\Nop.Web.MVC.Tests.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Tests\Nop.Web.MVC.Tests\Nop.Web.MVC.Tests.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Manual\Nop.Plugin.Payments.Manual.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Manual\Nop.Plugin.Payments.Manual.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\Nop.Web.Framework.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Presentation\Nop.Web.Framework\Nop.Web.Framework.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.UPS\Nop.Plugin.Shipping.UPS.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.UPS\Nop.Plugin.Shipping.UPS.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.Fedex\Nop.Plugin.Shipping.Fedex.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.Fedex\Nop.Plugin.Shipping.Fedex.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\Nop.Plugin.Payments.CheckMoneyOrder.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.CheckMoneyOrder\Nop.Plugin.Payments.CheckMoneyOrder.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalStandard\Nop.Plugin.Payments.PayPalStandard.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalStandard\Nop.Plugin.Payments.PayPalStandard.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalDirect\Nop.Plugin.Payments.PayPalDirect.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.PayPalDirect\Nop.Plugin.Payments.PayPalDirect.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.GoogleAnalytics\Nop.Plugin.Widgets.GoogleAnalytics.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.GoogleAnalytics\Nop.Plugin.Widgets.GoogleAnalytics.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExternalAuth.Facebook\Nop.Plugin.ExternalAuth.Facebook.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExternalAuth.Facebook\Nop.Plugin.ExternalAuth.Facebook.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.NivoSlider\Nop.Plugin.Widgets.NivoSlider.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Widgets.NivoSlider\Nop.Plugin.Widgets.NivoSlider.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\Nop.Plugin.ExchangeRate.EcbExchange.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.ExchangeRate.EcbExchange\Nop.Plugin.ExchangeRate.EcbExchange.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Pickup.PickupInStore\Nop.Plugin.Pickup.PickupInStore.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Pickup.PickupInStore\Nop.Plugin.Pickup.PickupInStore.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\Nop.Plugin.Shipping.FixedOrByWeight.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Shipping.FixedOrByWeight\Nop.Plugin.Shipping.FixedOrByWeight.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\Nop.Plugin.Tax.FixedOrByCountryStateZip.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Tax.FixedOrByCountryStateZip\Nop.Plugin.Tax.FixedOrByCountryStateZip.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\Nop.Plugin.DiscountRules.CustomerRoles.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.DiscountRules.CustomerRoles\Nop.Plugin.DiscountRules.CustomerRoles.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\Nop.Plugin.Payments.Worldpay.csproj : error  : The default XML namespace of the project must be the MSBuild XML namespace. If the project is authored in the MSBuild 2003 format, please add xmlns="http://schemas.microsoft.com/developer/msbuild/2003" to the <Project> element. If the project has been authored in the old 1.0 or 1.2 format, please convert it to MSBuild 2003 format.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Worldpay\Nop.Plugin.Payments.Worldpay.csproj

D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\Nop.Plugin.Payments.Square.csproj : error  : The attribute "Remove" in element <None> is unrecognized.  D:\SGU\IT\nam 4\thuong mai dien tu\tai_lieu\nopCommerce_4.00_Source\Plugins\Nop.Plugin.Payments.Square\Nop.Plugin.Payments.Square.csproj
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Hello,

As it is written here http://docs.nopcommerce.com/pages/viewpage.action?pageId=10256757 you now need Visual Studio 2017 to be able to edit nopCommerce code.

Due to dependency of .net Core, it cannot be done on previous versions like VS 2015 or VS 2013.

I hope my answer would help

As of the latest release (4.0) you must use Visual Studio 2017 Version 15.3 or higher.

atulrungta wrote:

I don't agree with you. I am using VS 2015, does not matter which version, and I don't have any problems doing what you said. I also know it is in the documentation written.

Best regards! -;)

I am using VS 2017 but can not run nopCommerce4 source. It is showing build error. Can you please share the prerequisite installation to run nopCommerce4 in VS 2017. Thanks.