How do I get the directory from a file's full path?

What is the simplest way to get the directory that a file is in? I'm using this to set a working directory.

string filename = @"C:\MyDirectory\MyFile.bat";

In this example, I should get "C:\MyDirectory".

If you definitely have an absolute path, use Path.GetDirectoryName(path).

If you might only have a relative name, use new FileInfo(path).Directory.FullName.

Note that Path and FileInfo are both found in the namespace System.IO.

Stack Overflow Q#674479, score: 1067