/// <summary>
/// Sends to entity to the bottom of the z-order stack.
/// </summary>
/// <param name="entity">The entity.</param>
public void SendToBack(IDiagramEntity entity)
{
if (mPaintables.Contains(entity))
{
mPaintables.Remove(entity);
mPaintables.Insert(0, entity);
ReAssignSceneIndex();
Rectangle rec = entity.Rectangle;
rec.Inflate(20, 20);
this.RaiseOnInvalidateRectangle(Rectangle);
}
}