// Get the composition target for the current window var compTarget = PresentationSource.FromVisual(this).CompositionTarget; // Add a dirty rect to update the entire element compTarget.AddDirtyRect(new Rect(0, 0, ActualWidth, ActualHeight));
// Get the composition target for the current window var compTarget = PresentationSource.FromVisual(this).CompositionTarget; // Add a dirty rect to update a specific area compTarget.AddDirtyRect(new Rect(0, 0, 100, 100));In these examples, we are using the AddDirtyRect method to mark an area as dirty so that it will be updated during the next display refresh. This method can be especially useful when dealing with graphical applications that require frequent updates to keep the display current.