Syntax:

public static string GetDirectoryName(string path)

Example:

using System; 
using System.IO; 

public class CGetDir{ 

public static void Main() { 

string fileName = @"C:\mydir\myfile.ext";
string path = @"C:\mydir\";
string rootPath = @"C:\";
string directoryName;

directoryName = Path.GetDirectoryName(fileName);

// directoryName will conatin  'C:\mydir'
directoryName = Path.GetDirectoryName(path);

// directoryName will conatin 'C:\mydir' 
directoryName = Path.GetDirectoryName(rootPath);
// directoryName will conatin '' Note:If the path consists of a root directory, such as "c:\", null is return 

}

}