How to troubleshoot "designer load encountered an error"

Henriksen, Keith (NTSHQ) 0 Reputation points
2025-01-26T19:04:53.7533333+00:00

Is there a good reference to assist with design time form load errors?

Windows Forms
Windows Forms
A set of .NET Framework managed libraries for developing graphical user interfaces.
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  2. Jiachen Li-MSFT 33,446 Reputation points Microsoft Vendor
    2025-01-28T08:37:43.5866667+00:00

    Hi @Henriksen, Keith (NTSHQ) ,

    It usually indicates an issue with the project build or a problem in the code. Here are some steps you can take to troubleshoot

    1. Clean and Rebuild the Project:
      • Right-click on the solution or project in the Solution Explorer.
      • Select Clean.
      • After cleaning, right-click again and select Rebuild.
    2. Check for Errors in Code:
      • Look for any errors in the .designer file or any third-party components that might be causing the issue.
      • Ensure that all necessary references are included and correctly configured.
    3. Delete Temporary Files:
      • Delete the bin and obj folders from the project directory. These folders contain temporary files that might be causing the issue.

    Best Regards.

    Jiachen Li


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  3. Jiachen Li-MSFT 33,446 Reputation points Microsoft Vendor
    2025-01-29T05:45:26.37+00:00

    Hi @Henriksen, Keith (NTSHQ) ,

    Ensure that there are no duplicate .resx files in your project. Sometimes, multiple resource files with the same name can cause this error.

    Open the .csproj file of your project. Look for any duplicate entries related to frmMain.resources. Ensure that each resource file has a unique ManifestResourceName.

    Best Regards.

    Jiachen Li


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