public override bool Move(Point offset)
{
var previousPositions = (new Point(Begin.Position.X, Begin.Position.Y), new Point(End.Position.X, End.Position.Y));
Begin.MoveIgnoringRelations(offset);
End.MoveIgnoringRelations(offset);
if (UnderlyingPolygon != null)
{
if (!UnderlyingPolygon.CorrectRelations(Begin) || !UnderlyingPolygon.CorrectRelations(End))
{
Begin.Position = previousPositions.Item1;
End.Position = previousPositions.Item2;
return(false);
}
}
return(true);
}