public void ToAsync()
{
FSharpAsync <int> a = L.F(() => 1).ToFSharpAsync();
FSharpAsync <Unit> b = a.IgnoreResult();
// super verbose return
FSharpAsync <int> i = ExtraTopLevelOperators.DefaultAsyncBuilder.Return(1);
FSharpAsync <int> x = FSharpAsyncEx.Return(1);
FSharpAsync <Func <int> > fa = FSharpAsyncEx.Return(L.F(() => 1));
}