private void CreateDT()
        {
            DataTable dt = new DataTable();
            //Adding data To DataTable
            dt.Columns.Add("ID");
            dt.Columns.Add("Name");
            dt.Columns.Add("Address");
            dt.Rows.Add(1, "VenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenkVenk", "chennai");
            dt.Rows.Add(2, "Hanu", "London");
            dt.Rows.Add(3, "john", "Swiss");
            //   DataGridView grid = new DataGridView();
           
            int i = 0;
            StreamWriter swExtLogFile = new StreamWriter("D:/DTlog2.txt", true);
            //StreamWriter sw = null;
            // sw = new StreamWriter(submittedFilePath, false);
            for (i = 0; i < dt.Columns.Count - 1; i++)
            {
                swExtLogFile.Write(dt.Columns[i].ColumnName + "\t" +"\t" + " | ");
            }
            swExtLogFile.Write(dt.Columns[i].ColumnName);
            swExtLogFile.WriteLine();
            foreach (DataRow row in dt.Rows)
            {
                object[] array = row.ItemArray;
                for (i = 0; i < array.Length - 1; i++)
                {
                    swExtLogFile.Write(array[i].ToString() + "\t" + "\t" + " | ");
                }
                swExtLogFile.Write(array[i].ToString());
                swExtLogFile.WriteLine();
            }
            swExtLogFile.Close();
        }