private void button2_Click(object sender, EventArgs e)
 {
     if (CompNameA.Text.Equals("") || CompSerial.Text.Equals(""))
     {
         MessageBox.Show("Please, Fill The Tnput Fields");
     }
     else
     {
         businesslayer bl = new businesslayer();
         bl.InsertComp(CompSerial.Text, CompNameA.Text);
         LoadAutoCompleteTextBoxes();
     }
 }