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c#windows-forms-designer

why am i getting error on windows form designer?

I'm working on legacy code in visual studio 2019 and c# and my projects has reference to Telerik component.

All my user control has designer error. Also when I create new empty user-control, I got designer error

I have this problem in current solution and when I create new fresh solution, everything is OK.

Note that I've checked the designer's code several times.

I searched for the problem on Google and tried the following ways

  1. reset the visual studio
  2. checking the following option: Tools >> Options >> Windows Forms Designer >> automatically Populate Toolbox

here is call stack for error

at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.EnsureDocument(IDesignerSerializationManager manager)at System.ComponentModel.Design.Serialization.CodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager manager) at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager) End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.PerformLoad(IDesignerSerializationManager serializationManager)at Microsoft.VisualStudio.Design.Serialization.CodeDom.VSCodeDomDesignerLoader.DeferredLoadHandler.Microsoft.VisualStudio.TextManager.Interop.IVsTextBufferDataEvents.OnLoadCompleted(Int32 fReload)

Solution

  • Please take a look at Windows Forms Designer error page

    hope it help to solve your problem

    And some helpful tips in Stackoverflow