字符串md5加密

[csharp] 
/// <summary> 
/// 字符串md5加密 
/// </summary> 
/// <param name="str"></param> 
/// <returns></returns> 
public static string StrToMD5(string str) 
{ 
    byte[] result = Encoding.Default.GetBytes(str.Trim()); 
 
    MD5 md5 = new MD5CryptoServiceProvider(); 
 
    byte[] output = md5.ComputeHash(result); 
 
    return BitConverter.ToString(output).Replace("-", ""); 
}