How to fix error MC1000 Unknown build error, 'Could not find type 'System.Web.UI.TagPrefixAttribute'

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I had a WPF project. For reporting service i am using

Microsoft.ReportingServices.ReportViewerControl.WebForms &

Microsoft.ReportingServices.ReportViewerControl.WinForms.

Everything working when it was running on .Net framework 4.7.2.

Now i ported it to .Net Core 3.0 and now i am facing this error.

Error MC1000 Unknown build error, 'Could not find type 'System.Web.UI.TagPrefixAttribute' in assembly 'C:\Program Files\dotnet\packs\Microsoft.NETCore.App.Ref\3.1.0\ref\netcoreapp3.1\System.Web.dll'.' My Shop WPF C:\Program Files\dotnet\sdk\3.1.101\Sdks\Microsoft.NET.Sdk.WindowsDesktop\targets\Microsoft.WinFX.targets 225

How i can resolve this issue ?

.net-core reporting-services wpf c#
1 Answers

The core library does not support all the Net library classes/methods. We have to create another project in .NET Framework and use Microsoft.ReportingServices in .NET Framework project.

Now add .Net Framework project to .Net core app

user_103067970
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