Connection String to access DataBase from App_Data Folder inside application

To access database from App_Data folder inside application, we need to write our connection string like....

<connectionStrings>

    <add name="MyConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Book.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/>

  </connectionStrings>