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The designer inspected the following classes in the file: 

Visual Studio was able to identify all the classes in the file; following this error will be a list detailing why each class failed Visual Studio requirements.

The list may include one of the following specific errors:

The base class '<class name>' could not be loaded

The base class '<class name>' cannot be designed

The designer for base class '<class name>' is not installed

To correct this error

  • Derive from a base class that supports designers.

    If the class is deriving from something within the project, like an inherited form or control, make sure the project is built by selecting Build Solution from the Build menu.

See Also