Here's a working code for you: OleDbConnection conn=newOleDbConnection("Provider=SQLOLEDB.1;Persist Security Info=False;UserID=sa;Password=sa;Initial Catalog=Northwind;DataSource=d-2818-w2k"); OleDbDataAdapter adpt=new OleDbDataAdapter("Select*fromOrders",conn);DataSetdataSet=newDataSet(); adpt.Fill...