MultiScaleTileSource local image

How to set the local image for the MultiScaleTileSource?

protected override void GetTileLayers(int tileLevel, int tilePositionX, int tilePositionY, IList<object> tileImageLayerSources)
{
   var veUri = new U开发者_Python百科ri("Resources/image1.png", UriKind.Relative);
   tileImageLayerSources.Add(veUri); // Don't not work for me
}

Thank you in advance!

MultiScaleImage does not support local images.