using System;

using System.Text;              

​

public class Program

{

    public static void Main()

    {

        var b = new byte[] {94, 85, 60, 64, 62, 69, 77, 65, 131, 20, 125, 110, 136, 128, 87, 112};

        var c = "0x" + ByteArrayToString(b);

        Console.WriteLine(c);

        var result = Convert.ToBase64String(Encoding.UTF8.GetBytes(c));

        Console.WriteLine(result);

    }

    // Adapted from here: https://stackoverflow.com/a/311179/3043

    public static string ByteArrayToString(byte[] ba)

    {

      StringBuilder hex = new StringBuilder(ba.Length * 2);

      foreach (byte b in ba)

        hex.AppendFormat("{0:X2}", b);

      return hex.ToString();

    }

}