await Dispatcher.InvokeAsync(() =>
{
    // This runs between input processing
    ProcessNextChunk();
}, DispatcherPriority.Background);

await Dispatcher.InvokeAsync(() =>
{
    // Runs after layout/render
    ScrollIntoView(lastItem);
}, DispatcherPriority.Loaded);

Dispatcher.InvokeAsync(() =>
{
    // Low priority cleanup
    ClearUnusedCache();
}, DispatcherPriority.ApplicationIdle);

public async Task ProcessLargeDataAsync(IList<Item> items)
{
    for (int i = 0; i < items.Count; i++)
    {
        Process(items[i]);

        // Yield every 100 items to process pending input
        if (i % 100 == 0)
        {
            await Dispatcher.Yield(DispatcherPriority.Background);
            UpdateProgress(i, items.Count);
        }
    }
}

// Check if on UI thread
if (!Dispatcher.CheckAccess())
{
    Dispatcher.Invoke(() => UpdateUI());
    return;
}

// From background thread
await Task.Run(() =>
{
    var result = HeavyComputation();

    // Marshal back to UI
    Dispatcher.Invoke(() => DisplayResult(result));
});

// ❌ Send priority - can cause deadlock
Dispatcher.Invoke(() => {}, DispatcherPriority.Send);

// ❌ Blocking UI thread
Thread.Sleep(1000);

// ✅ Use async/await instead
await Task.Delay(1000);