Trading Card badges data access
if you only have one set of cards, the series will be 1
the user has can have two different badges for a series; the regular (max level 5) and the foil (max level 1)
public static int GetGameBadgeLevel(int nSeries, bool bFoil) { InteropHelp.TestIfAvailableClient(); return NativeMethods.ISteamUser_GetGameBadgeLevel(nSeries, bFoil); }