Example
<TextBlock x:Name="MyControl"
Text="Hello, world!" />
var rtb = new RenderTargetBitmap();
await rtb.RenderAsync(MyControl); // Render control to RenderTargetBitmap
// Get pixels from RTB
IBuffer pixelBuffer = await rtb.GetPixelsAsync();
byte[] pixels = pixelBuffer.ToArray();
// Support custom DPI
DisplayInformation displayInformation = DisplayInformation.GetForCurrentView();
var stream = new InMemoryRandomAccessStream();
BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, stream);
encoder.SetPixelData(BitmapPixelFormat.Bgra8, // RGB with alpha
BitmapAlphaMode.Premultiplied,
(uint)rtb.PixelWidth,
(uint)rtb.PixelHeight,
displayInformation.RawDpiX,
displayInformation.RawDpiY,
pixels);
await encoder.FlushAsync(); // Write data to the stream
stream.Seek(0); // Set cursor to the beginning
// Use stream (e.g. save to file)
