Use local function

Author: AndreiMisiukevich

src/CommunityToolkit/Xamarin.CommunityToolkit/Views/AvatarView/AvatarView.shared.cs

@@ -356,11 +356,12 @@ async void OnSourcePropertyChanged(bool isBindingContextChanged)
 				{
 					if (source is UriImageSource uriImageSource)
 					{
-						var getStream = new Func<CancellationToken, Task<Stream>>(async (token) => uriImageSource.Uri != null ? await uriImageSource.GetStreamAsync(token) : null);
-						var stream = await getStream.Invoke(imageLoadingTokenSource.Token);
+						static async Task<Stream> getStreamAsync(UriImageSource uriSource, CancellationToken token) => uriSource.Uri != null ? await uriSource.GetStreamAsync(token) : null;
+
+						var stream = await getStreamAsync(uriImageSource, imageLoadingTokenSource.Token);
 
 						source = stream != null
-							? ImageSource.FromStream(async (token) => stream?.CanRead ?? true ? stream : (stream = await getStream.Invoke(token)))
+							? ImageSource.FromStream(async (token) => stream?.CanRead ?? true ? stream : (stream = await getStreamAsync(uriImageSource, token)))
 							: null;
 
 						Image.IsVisible = source != null;