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The implementation of Path.GetFullPath() Does not use the GetFullPathName Windows API call.
As a result, When the argument is 'C:' or 'D:' or similar, for any drive other than the current drive, Mono will return the root folder instead of the current directory on the specified drive.
Steps to reproduce the problem:
1. Launch cmd.exe
2. Switch drive to D: ('CD D:')
3. Enter some directory ('CD dir1')
4. Go Back to C: and launch a program containing the lines:
The expected result is consistent with the Micsrosoft.Net Framework.
How often does this happen?
Created attachment 4203 [details]
A program that demonstrates the issue
A fix was committed to Master at 2013-06-28.