//--------------------------------------------------------------------------------------------------
public override void Remove()
{
if (_AisShape == null)
{
return;
}
if (AisContext.IsHilighted(_AisShape))
{
AisContext.Unhilight(_AisShape, false);
}
AisContext.Remove(_AisShape, false);
AisContext.Erase(_AisShape, false);
_AisShape = null;
_UpdateMarker();
}