private void button_Click(object sender, RoutedEventArgs e)
        {
            AddPosition addPosition = new AddPosition();

            addPosition.mode = 1;
            addPosition.Show();
        }
        private void edit_Click(object sender, RoutedEventArgs e)
        {
            var         x           = ((EmployeePosition)datagridview.SelectedItem);
            AddPosition addPosition = new AddPosition();

            addPosition.positionid = x.EmployeePositionID;
            addPosition.mode       = 2;
            addPosition.Show();
        }