private void RemoveUserControl()
 {
     if (m_userControl_collisionType != null)
         m_grid_main.Children.Remove(m_userControl_collisionType);
     m_userControl_collisionType = null;
 }
 private void Select(CollisionType collisionType)
 {
     RemoveUserControl();
     m_userControl_collisionType = new UserControl_CollisionType(collisionType);
     m_grid_main.SetRowColumn(m_userControl_collisionType, 1, 0);
 }
 private void New()
 {
     RemoveUserControl();
     m_userControl_collisionType = new UserControl_CollisionType(null);
     m_grid_main.SetRowColumn(m_userControl_collisionType, 1, 0);
 }