   private void button1_Click(object sender, EventArgs e)
      {
         if (checkBox1.Checked)
         {
            strCon = "Data Source=" + serverName.Text.Trim().ToUpper() + ";Initial Catalog=" + databaseName.Text.Trim()+";Integrated Security=True";
            connection = new  SqlConnection(strCon);
            connection.Open();
            MessageBox.Show("  ");
         }
      }
