SqlMobile COnnection error;Reference Assembly not found
I am getting following error:
Error 1 The type 'System.Data.Common.DbConnection' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. C:\Documents and Settings\Adnan\My Documents\Visual Studio 2005\Projects\Mobile5\Mobile5\Form1.cs 20 4 Mobile5
the line which caused problem is
System.Data.SqlServerCe.SqlCeConnection conn = null;
following are being used as reference
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.IO;
using System.Windows.Forms;
using System.Data.SqlServerCe;
using System.Data.SqlClient;
PLease guide me

