C# MD5加密

/// <summary>
/// MD5加密
 /// </summary>
 /// <param name="strText">待加密字符串</param>
 /// <returns>加密后字符串</returns>
 public static string MD5Encrypt(string strText)
 {
     MD5 md5 = new MD5CryptoServiceProvider();
     byte[] targetData = md5.ComputeHash(Encoding.UTF8.GetBytes(strText));

     string byte2String = null;

     for (int i = 0; i < targetData.Length; i++)
     {
         byte2String += targetData[i].ToString("x2");
     }

     return byte2String.ToUpper();
 }