Best method for comparing windows directory names [duplicate]

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Possible Duplicate:

How can I compare (directory) paths in C#?

I have a filename and a directory name and I want to determent if the file is in the directory. My first thought was to use string comparison and check that the filena开发者_高级运维me string starts with the directory name string. However, that would fail in the case where the directory name was a UNC path and the filename was a mapped drive. Or if there were some other form of alias in one of the strings.

The string comparison just doesn't seem like a reliable method. Is there a built in .NET function for determining if 2 'DirectoryInfo' objects are pointing to the same folder?

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You should use the Path class.

Something like the following would do the trick:

string.Compare(Path.GetDirectoryName(filePath), directoryPath.Trim('\\'), true)

If you wanted to handle relative paths then you can convert directoryPath and filePath into full paths first:

string.Compare(Path.GetDirectoryName(Path.GetFullPath(filePath)), GetFullPath(directoryPath).Trim('\\'), true)

EDIT: Edited to perform case invariant comparisons.