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DataSet Read with SqlDataAdapter

using System; using System.Data;             using System.Data.SqlClient;   using System.Collections.Generic; using System.Text;   class Program   {     static void Main(string[] args)     {       SqlConnection thisConnection = new SqlConnection(                 @"Data Source=.\SQLEXPRESS;" +                 @"AttachDbFilename='NORTHWND.MDF';" +                 @"Integrated Security=True;Connect Timeout=30;User Instance=true");       SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT CustomerID, ContactName FROM Customers", thisConnection);       DataSet thisDataSet = new DataSet();       thisAdapter.Fill(thisDataSet, "Customers");       foreach (DataRow theRow in thisDataSet.Tables["Customers"].Rows)       {         Console.WriteLine(theRow["CustomerID"] + "\t" +theRow["ContactName"]);       }       thisConnection.Close();     }   }