Linq To Sql Demo

Web.Config

<appSettings>
    <add key="constr" value="Data Source = machine/server;
    Initial Catalog=DatabaseName;User ID=userid; password=password"/>
  </appSettings>
    <connectionStrings>
  <add name="TradeplusConnectionString" connectionString="Data Source = machine/server;Initial Catalog=DatabaseName;User ID=userid; password=password"
       providerName="System.Data.SqlClient" />
 </connectionStrings>