DataAdapter Double Fill C# ADO

using System;
using System.Data;
using System.Data.OleDb;
using System.Data.SqlClient;


namespace DataReader
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
string strConn="Provider=SQLOLEDB;User ID=sa;Password=gatsol;Initial Catalog=vins;Data Source=211.236.186.207;";
OleDbConnection Cn = new OleDbConnection(strConn);

OleDbDataAdapter daPdsBoard, daFormType;
DataSet ds;

string StrSQL1 =" Select IDX, Name, Title From PdsBoard ";
string StrSQL2 =" Select FormTypeID, FormTypeName From FormType ";
daPdsBoard = new OleDbDataAdapter(StrSQL1,Cn);
daFormType = new OleDbDataAdapter(StrSQL2,Cn);
ds = new DataSet();
daPdsBoard.Fill(ds);
daFormType.Fill(ds);
}
}
}