//Only allows user to select from one datagridview at a time
 private void PatientsClassDGV_SelectionChanged(object sender, EventArgs e)
 {
     PatientsClassWaitingDGV.ClearSelection();
 }
 private void PatientsClassWaitingDGV_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
 {
     PatientsClassWaitingDGV.ClearSelection();
 }