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Use a DataAdapter to fill a DataTable

using System; using System.Data; using System.Data.SqlClient;     class Program     {         static void Main(string[] args)         {             string sqlConnectString = "Data Source=(local);Integrated security=SSPI;Initial Catalog=AdventureWorks;";             string sqlSelect = "SELECT TOP 5 * FROM Sales.SalesOrderDetail";             SqlDataAdapter da = new SqlDataAdapter(sqlSelect, sqlConnectString);             DataTable dt = new DataTable();             da.Fill(dt);                          dt.Columns.Add(new DataColumn("ExtendedPrice", typeof(Decimal),                 "UnitPrice * (1 - UnitPriceDiscount) * OrderQty"));             foreach (DataRow row in dt.Rows)                 Console.WriteLine("ID = {0}, UnitPrice = {1}, " +                     "Disc = {2}, Qty = {3}, Total = {4}",                     row["SalesOrderDetailID"], row["UnitPrice"],                     row["UnitPriceDiscount"], row["OrderQty"],                     row["ExtendedPrice"]);         }     }