Public Overridable ReadOnly Property InvalidRectangle As Rectangle

Dim instance As AnnObject
Dim value As Rectangle
 
value = instance.InvalidRectangle

public virtual Rectangle InvalidRectangle {get;}

public:
virtual property Rectangle InvalidRectangle {
   Rectangle get();
}

Private Sub AnnObject_InvalidRectangle(ByVal obj As AnnObject, ByVal name As String, ByVal viewer As RasterImageViewer)
   ' first save the old invalid rectangle
   Dim rcOld As Rectangle = obj.InvalidRectangle
   ' set the name
   obj.Name = name
   obj.NameVisible = True
   obj.NameFont = New AnnFont("Arial", New AnnLength(10, AnnUnit.Point), FontStyle.Bold Or FontStyle.Italic)

   ' get the new invalid rectangle
   Dim rcNew As Rectangle = obj.InvalidRectangle

   ' re-paint this object by invalidating the union of both rectangles
   viewer.Invalidate(Rectangle.Union(rcOld, rcNew))
End Sub

private void AnnObject_InvalidRectangle(AnnObject obj, string name, RasterImageViewer viewer)
{
   // first save the old invalid rectangle
   Rectangle rcOld = obj.InvalidRectangle;
   // set the name
   obj.Name = name;
   obj.NameVisible = true;
   obj.NameFont = new AnnFont("Arial", new AnnLength(10, AnnUnit.Point), FontStyle.Bold | FontStyle.Italic);

   // get the new invalid rectangle
   Rectangle rcNew = obj.InvalidRectangle;

   // re-paint this object by invalidating the union of both rectangles
   viewer.Invalidate(Rectangle.Union(rcOld, rcNew));
}