how to make connection to windows mobile6.0 application to sqlce3.5 database and store data to table in database

using System;
using System.Linq;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlServerCe;

namespace SmartDeviceProject3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

       
        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                SqlCeConnection cnn = null;
                String str = "Data Source=E:\\mobile\\Mydatabase#1.sdf;Persist Security Info=False";  //data base is located in My Computer/E:/mobile/Mydatabase#1.sdf
                cnn = new SqlCeConnection(str);
                SqlCeCommand cmd = new SqlCeCommand();
                cmd.Connection = cnn;
                cmd.CommandType = CommandType.Text;
                cmd.Connection = cnn;
                cmd.CommandType = CommandType.Text;
                cnn.Open();
                cmd.ExecuteNonQuery();
                cmd = null;
                MessageBox.Show("data store successfully");
                cnn.Close();
            }
            catch (Exception a)
            {
                MessageBox.Show(a.Message);
            }
        }
    }
}