removes a metadata key from the lobby
public static bool DeleteLobbyData(CSteamID steamIDLobby, string pchKey) { InteropHelp.TestIfAvailableClient(); using (var pchKey2 = new InteropHelp.UTF8StringHandle(pchKey)) { return NativeMethods.ISteamMatchmaking_DeleteLobbyData(steamIDLobby, pchKey2); } }