private void btnCreateAndAssign_Click(object sender, RoutedEventArgs e)
        {
            this.CreateCaseFile();
            AssignUser usersPane = new AssignUser();

            usersPane.ShowDialog();
            this.Close();
        }
        private void btnAssignUser_Click(object sender, RoutedEventArgs e)
        {
            AssignUser assignUserWindow = new AssignUser();

            assignUserWindow.ShowDialog();
        }