RIPEMD-160 is another hash function; it computes a 160-bit message digest.

There is a RIPEMD-160 home page, with test vectors and pseudocode for RIPEMD-160.
For padding the message, RIPEMD-160 acts like MD4 (RFC 1320).

Find the RIPEMD-160 message digest of a string of octets.
Use the ASCII encoded string “Rosetta Code”.
You may either call an RIPEMD-160 library, or implement RIPEMD-160 in your language.

using System;
using System.Security.Cryptography;
using System.Text;
 
class Program
{
    static void Main(string[] args)
    {
        string text = "Rosetta Code";
        byte[] bytes = Encoding.ASCII.GetBytes(text);
        RIPEMD160 myRIPEMD160 = RIPEMD160Managed.Create();
        byte[] hashValue = myRIPEMD160.ComputeHash(bytes);
        var hexdigest = BitConverter.ToString(hashValue).Replace("-", "").ToLower();
        Console.WriteLine(hexdigest);
        Console.ReadLine();
    }
}