private void searchButton_Click(object sender, RoutedEventArgs e)
 {
     searchName = searchTextBox.Text;
     if (searchName != "")
     {
         CoachesWithoutClub coachesWithoutClub = new CoachesWithoutClub(searchName, true);
         this.Close();
         coachesWithoutClub.Show();
         coachesWithoutClub.Topmost = true;
     }
 }
        private void coachWithoutClubButton_Click(object sender, RoutedEventArgs e)
        {
            CoachesWithoutClub coachesWithoutClubWindow = new CoachesWithoutClub();

            coachesWithoutClubWindow.Owner = this;
            if (IsOpen == false)
            {
                //addTeamWindow.deleteButton.Visibility = Visibility.Collapsed;
                coachesWithoutClubWindow.Show();
                coachesWithoutClubWindow.Topmost = true;
                IsOpen = true;
            }
        }