4 references to Union
System.Windows.Forms (1)
System\Windows\Forms\ErrorProvider\ErrorProvider.ErrorWindow.cs (1)
339
windowRegion.
Union
(iconRegion.Region);
System.Windows.Forms.Design (3)
System\Windows\Forms\Design\Behavior\DropSourceBehavior.cs (1)
802
invalidDragRegion.
Union
(invalidRegion);
System\Windows\Forms\Design\SelectionUIService.cs (1)
827
region.
Union
(item.GetRegion());
System\Windows\Forms\Design\ToolStripDesignerUtils.cs (1)
471
invalidateRegion.
Union
(itemRegion);