/// <summary>
/// The getHashMD5 method obtain a string representing the calculated hash of the current document for unique identification.
/// </summary>
/// <returns></returns>
public string getHashMD5()
{
Error_Control_Block ecb = new Error_Control_Block();
StringBuilder buffer = new StringBuilder(33);
Check(ISYS11df.IGR_Calculate_MD5(NeedStream(), buffer, ref ecb), ecb);
return(buffer.ToString());
}
