public static async Task <T> GetOrAddLazyAsync <T>(this ConcurrentTypeSet <object> set, Func <Task <T> > valueFactory)
{
Contracts.Requires.That(set != null);
Contracts.Requires.That(valueFactory != null);
return(await set.GetOrAdd(new AsyncLazy <T>(valueFactory)));
}
public static T GetOrAddLazy <T>(this ConcurrentTypeSet <object> set, Func <T> valueFactory)
{
Contracts.Requires.That(set != null);
Contracts.Requires.That(valueFactory != null);
return(set.GetOrAdd(new Lazy <T>(valueFactory)).Value);
}