ColorSwapFilter Class

public ref class ColorSwapFilter sealed : IFilter, 
	__IColorSwapFilterPublicNonVirtuals

using (var filterEffect = new FilterEffect(source))
{
    // Initialize the filter and add the filter to the FilterEffect collection
    var filter = new ColorSwapFilter(new Windows.UI.Color() { R = 223, G = 57, B = 141 }, new Windows.UI.Color() { R = 0, G = 255, B = 0 }, 0.08, false, false);

    filterEffect.Filters = new IFilter[] { filter };

    // Create a target where the filtered image will be rendered to
    var target = new WriteableBitmap(width, height);

    // Create a new renderer which outputs WriteableBitmaps
    using (var renderer = new WriteableBitmapRenderer(filterEffect, target))
    {
        // Render the image with the filter(s)
        await renderer.RenderAsync();

        // Set the output image to Image control as a source
        ImageControl.Source = target;
    }

    await SaveEffectAsync(filterEffect, "ColorSwapFilter.jpg", outputImageSize);
}