private string Encrypt(string strpsw)
{
MD5 md5 = new MD5CryptoServiceProvider();
Byte[] data = http://www.mamicode.com/System.Text.Encoding.Default.GetBytes(strpsw); //将字符编码为一个字节序列
byte[] md5data = http://www.mamicode.com/md5.ComputeHash(data); //计算data字节数组的哈希值
md5.Clear();
string str = "";
for (int i = 0; i < md5data.Length - 1; i++)
{
str += md5data[i].ToString("X").PadLeft(2, ‘0‘);
}

return str;

}

MD5算法