[RESOLVED] Help with Copying Datarow

[daimous]

hi guys help please.
Currently i have a code below that Supposedly copy the structure of the Dataset "ds" to Dataset "tmpds" and perform a logical test and if it is true a Datarow from Table1 of "ds" Dataset will be copied or Add to Table1 of "tmpds" Dataset but it has an error (See the Code in Bold letters)

CODE:

        DataSet FuncTrimValidity(DataSet ds)
        {
            DataSet tmpds = ds.Clone();
            DataRow dr;// = new DataRow();
            try
            {      
                //My logical test here if if it is true perform the code below
                //IF(My logic Test){ //But this does not matter to my question
                dr = ds.Tables[1].Rows[0];
                tmpds.Tables[1].Rows.Add(dr); //Error Occurs Here
                //}
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            return tmpds;
        }

ERROR:

"This row already belongs to another table."

Any suggestion guys to solve the problem? Thanks in advance!