MD5加密
需应用using System.Security.Cryptography;
byte[] bytePassword = null;
string tmpPassword = textBox1.Text.Trim();
MD5 md5 = MD5.Create();
bytePassword = md5.ComputeHash(Encoding.Unicode.GetBytes(tmpPassword));
md5.Clear();
textBox2.Text = Convert.ToBase64String(bytePassword);