I think you should avoid task.Wait()

[saramgsilva]

This kind of things "task.Wait();" can create deadlocks, you should not use it.

        var task = Task.Run(async () => { 
            Service = await MemoryDirectoryService.FromCsv("XamarinDirectory.csv"); 
        });
        task.Wait();

you should do only

             Service = await MemoryDirectoryService.FromCsv("XamarinDirectory.csv");