Working with database in C# Pocket PC

Hi all,
I want to develop an application that work with DB on pocket PC.
I have added the DB to the project from Menu->Data->Add New Data
Source.
I want to insert some Rows in a table of this Db.
I know that I can create a connection and insert values with sql
statements like that:

       public void SaveSettings(TSaveSettings Values)
       {

           DBConnection = new SqlCeConnection();
           DBConnection.ConnectionString = @"Data Source = ..\My
Documents\Db.sdf";

           //Create a SqlCeCommand on your connection
           SqlCeCommand InsertCommand = DBConnection.CreateCommand();

           //Set the CommandText for the command
           //The ?'s represent parameters that will be set later
           InsertCommand.CommandText = "Insert Into Settings(ComPort)
Values (?)";

           //Add parameters and assign them the values from the
TextBoxes on the form
           InsertCommand.Parameters.Add(new SqlCeParameter("ComPort",
SqlDbType.NText));

           InsertCommand.Parameters["ComPort"].Value =
Values.ComPort;

           //Open the connection, execute the query
           DBConnection.Open();
           InsertCommand.ExecuteNonQuery();

           //Close the connection
           if (DBConnection.State == ConnectionState.Open)
               DBConnection.Close();
       }

in this way it work, but why I have added the Db to the project? I
want from my application to make operation on my DB without creating
connection, open it and close it by code, but I want to use smoe
things like dataset, adding rows by rows.add().. and so on.

Can you help me with some examples or tutorials on line?
thank you very much