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C# - How to Get Root Directory of the Given Directory?

Learn, how to get root directory of given directory using C# program?
Submitted by IncludeHelp, on November 13, 2017 [Last updated : March 26, 2023]

Get Root Directory of the Given Directory

To get root directory of the given directory in C#, we use Directory.GetDirectoryRoot() method.

Directory.GetDirectoryRoot()

This is a method of 'Directory' class, it returns the root directory name.

Syntax

string Directory. GetDirectoryRoot(string path);

Parameter(s)

1. path - It is a location of directory.

Return Value

This method returns the string that contains root-directory.

C# program to get root directory of the given directory

using System;
using System.IO;

namespace ConsoleApplication1 {
  class Program {
    static void Main() {
      string rootDir = "";

      rootDir = Directory.GetDirectoryRoot("D:/Sample/dir2/Green color");
      Console.WriteLine("Root Directory is : (" + rootDir + ")");

      rootDir = Directory.GetDirectoryRoot("D:/Sample/dir2/Blue color");
      Console.WriteLine("Root Directory is : (" + rootDir + ")");

      rootDir = Directory.GetDirectoryRoot("C:/Windows/Help/Windows");
      Console.WriteLine("Root Directory is : (" + rootDir + ")");

    }
  }
}

Output

Root Directory is : (D:\)
Root Directory is : (D:\)
Root Directory is : (C:\)

Explanation

In the above program, we need to remember, when we use "Directory" class, System.IO namespace must be included in the program.

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