VALIDATION - if loop

Hi
      if ((phycmb.SelectedItem.Text != "" && phycmb.SelectedItem.Text != null))                 {                     gkc.PhyName = phycmb.SelectedItem.Text.ToString();                 }
    if (usercmb.SelectedItem.Value != null && usercmb.SelectedItem.Value != "" )                 {                     gk ...