MD5加密算法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Security.Cryptography;

namespace FrMD5
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btChange_Click(object sender, EventArgs e)
        {
            txtMD5.Text = GetMD5(txtString.Text.Trim());
        }
        public static string GetMD5(string st)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] t = md5.ComputeHash(Encoding.GetEncoding("utf-8").GetBytes(st));
            StringBuilder sb = new StringBuilder(32);
            for (int i = 0; i < t.Length; i++)
            {
                sb.Append(t[i].ToString("x").PadLeft(2, ‘0‘));
            }
            return sb.ToString();

        }
    }
}