protected void button1_Click(object sender, EventArgs e)
    {
        DateTime  dt     = Convert.ToDateTime(TextBox3.Text);
        DateTime  dt1    = Convert.ToDateTime(TextBox4.Text);
        NewsClass news   = new NewsClass(TextBox1.Text, TextBox2.Text, dt, dt1);
        string    result = ConnectionClass.AddNews(news);

        lblresult.Text = result;
    }