using System;
using System.Security.Cryptography;

public class Test
{
	public static void Main()
	{
		
		    String publicKeyBase64 = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAENGbyXUzeZTdeyyNuXyc0nMzXmnLlxMwd/t/sCZr3RPhytPbZpR/V4/xHqN/MVzozzq30I0/eUefbThEBl236Og==";

            byte[] publicKey = Convert.FromBase64String(publicKeyBase64);
            SHA256 sha256 = SHA256Managed.Create();
            byte[] hash = sha256.ComputeHash(publicKey);
            String publicKeyHash = Convert.ToBase64String(hash);

            Console.WriteLine("Result: {0}", publicKeyHash);
	}
}