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Compiler Error CS2021
File name 'file' is too long or invalid
All file names passed to the C# compiler must be no longer than _MAX_PATH (defined in a Windows header file). the compiler will give this error in the following situations:
- A file name (including the path) is longer than _MAX_PATH.
- The file name contains invalid characters.
- The file name contains wildcards where wildcards are not allowed (such as in resource file names).