SHA512 Encription Function

using System;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Data;
using System.Collections.Generic;

public class Program
{
    public static void Main()
    {
        string xHasil;
        string xPassword = "String";

        SHA512Managed sham = new SHA512Managed();
        ASCIIEncoding ae = new ASCIIEncoding();
        byte[] Hash = sham.ComputeHash(ae.GetBytes(xPassword.Trim()));
        StringBuilder sb = new StringBuilder(Hash.Length * 2);

        for (int idx = 0; idx <= Hash.Length - 1; idx++) {
            string temp = "0" + string.Format("{0:x4}", Hash[idx]);
            sb.Append(temp.Substring(temp.Length - 2));
        }

        xHasil = sb.ToString().Trim().ToUpper();
        return xHasil;
    }
}