private void editDepartment_MouseUp(object sender, MouseButtonEventArgs e)
        {
            DataRowView row = (DataRowView)departmentsGrid.SelectedItem;

            if (row != null)
            {
                int    id      = (int)row["ID"];
                string name    = (string)row["Name"];
                string faculty = (string)row["Faculty"];

                DepartmentAddEdit addEdit = new DepartmentAddEdit();
                addEdit.Closed += (s, eventarg) =>
                {
                    departments_Initialized(s, eventarg);
                };
                addEdit.Owner         = this;
                addEdit.txtId.Text    = id.ToString();
                addEdit.txtName.Text  = name;
                addEdit.comboBox.Text = faculty;
                addEdit.ShowDialog();
            }
            else
            {
                MessageBox.Show("Please select a row to edit!", "Information", MessageBoxButton.OK, MessageBoxImage.Warning);
            }
        }
        private void addDepartment_MouseUp(object sender, MouseButtonEventArgs e)
        {
            DepartmentAddEdit addEdit = new DepartmentAddEdit();

            addEdit.Closed += (s, eventarg) =>
            {
                departments_Initialized(s, eventarg);
            };
            addEdit.Owner = this;
            addEdit.ShowDialog();
        }