How to Write dataset into text file

[b.gahlot]

Hi
I read a delimited text file into dataset. i am writing these dataset values line by line in another text file.

Code i am Writing is :
public void ExportShop()
{

try
{
Console.Clear();
DataTable TarGetTable;
TarGetTable = AddDataToTable();
String TargetStringFilePath;
TargetStringFilePath = @"c:\aaa.txt";
StreamWriter fw = File.CreateText(TargetStringFilePath);

foreach (DataRow drPrintRow in TarGetTable.Rows)
{
String str = drPrintRow["RectType"].ToString();
str += drPrintRow["OrderPre"].ToString();
str += drPrintRow["OrdNum"].ToString();
str += drPrintRow["SourceOff"].ToString();
fw.WriteLine(str);
}


fw.Flush();

fw.Close();
}
but i want to dataset values in only one step without line by line. pls ans me.
is this possible?