public SampleTileProvider()
{
AddTile(new TileIndex(0, 0, "0"));
AddTile(new TileIndex(0, 0, "1"));
AddTile(new TileIndex(0, 1, "1"));
AddTile(new TileIndex(1, 0, "1"));
AddTile(new TileIndex(1, 1, "1"));
}