ShellTile.ActiveTiles.FirstOrDefault();
устарел.
void clearTile() {
ShellTileData tileData = new StandardTileData
{
Title = "",
Count = 0,
BackContent = "",
BackTitle = "",
BackBackgroundImage = new Uri("", UriKind.Relative),
BackgroundImage = new Uri(@"/ApplicationIcon.png", UriKind.Relative)
};
IEnumerator<ShellTile> it = ShellTile.ActiveTiles.GetEnumerator();
it.MoveNext();
ShellTile tile = it.Current;
tile.Update(tileData);
}
Основано на исследованиях и благодаря robertftw