CS0012 error trying to run or compile a project

[Paola]

Hi,

I'm developing an ASP.NET Core MVC app targeting .NET 8 with VS2022 on a x64 Windows 10 Professional.

The app has one grid using a custom popup editing template with some editing Kendo widgets in it.
I've found that, if I omit to call ".Deferred()" on the Grid or ".ToClientTemplate()" on every widgets inside the custom template, I got the following error trying to run or compile my app from Visual Studio:

Error CS0012 The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'

The very same happens if I try to run or compile the example project found in the UI for ASP.NET Core MSI installer package!

I'm using a trial version of Telerik.UI.for.AspNet.Core 2024.2.514.

Can you help me, please?

[Mihaela]

Hello Paola,

Since we discussed the case in a support thread, I will post the solution here in case someone else hits the same error:

The issue occurred when the application targeted .NET 8 and was a NuGet cache problem. When cleaning up the application cache, the error was resolved.

 

Regards,
Mihaela
Progress Telerik

[William]

I down-voted this because it did not solve my issue.  Maybe it would solve someone elses?