public void Data(string UserName, string Pwd)
        {
            string Url = System.Environment.CurrentDirectory;
            string DatabasePath = @"C:\Users\fhc\Documents\Visual Studio 2012\Projects\MyAndroidTest\MyAndroidTest\bin\Debug\Mytest.db3";
            //SqliteConnection.CreateFile(DatabasePath);
            SqliteConnection conn = new SqliteConnection();
            conn.ConnectionString = "Data Source=" + DatabasePath;
            SqliteCommand cmd = conn.CreateCommand();
            cmd.CommandText = "insert into Mytest (UserName,Pwd) values('" + UserName + "','" + Pwd + "')";
            try
            {
                conn.Open();
                cmd.ExecuteNonQuery();
                conn.Dispose();
            }
            catch (Exception ex)
            {
                object obj = ex;
            }

        }