When attempting to open an inherited form in the Windows Form Designer, the following error is displayed. "The designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: <filename> <class name> --- The base class '<base class name>' could not be loaded.

Learn how to use the Gaming Services Repair Tool to troubleshoot installation and update issues with Gaming Services on PC.

After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend moving to Windows 11. Learn more. Note: Use these steps for Windows programs.

Use the System File Checker tool to repair missing or corrupted system files. When critical Windows system files are missing or corrupted, some Windows features may stop working correctly or Windows may stop responding altogether.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.

The installation file is typically named Autorun.exe or Setup.exe, but this may vary. If you're not sure, check the Readme file in the folder for instructions about how to run the installation process.

When attempting to open an inherited form in the Windows Form Designer, the following error is displayed. "The designer could not be shown for this file because none of the classes within it can be designed. The designer inspected the following classes in the file: <filename> <class name> --- The base class '<base class name>' could not be loaded.

Get Help has troubleshooters you can run for many common scenarios. These often help resolve issues without the need to contact support. If a troubleshooter is available for your issue, select Run to start that troubleshooter.

Learn how to resolve errors related to running Office installed by Click-to-Run and Windows Installer (MSI).

To apply this hotfix, you must have Visual Studio 2010 installed. You must restart the computer after you apply the hotfix if the affected file is being used. We recommended that you close any instance of Visual Studio before you apply the hotfix. This hotfix does not replace any other hotfix.