Async/await for WindowsRuntimeComponents

sample.cs

namespace WindowsRuntimeComponent1
{
    using System;
    using System.Collections.Generic;
    using System.Threading.Tasks;
    using Windows.Foundation;
    
    public interface IDoStuff
    {
        IAsyncAction DoItAsync();

        IAsyncOperation<IList<string>> X();
    }

    // http://msdn.microsoft.com/en-us/library/windows/apps/br230301.aspx#AsyncOps
    public sealed class Class1 : IDoStuff
    {
        IAsyncAction IDoStuff.DoItAsync()
        {
            return Task.Run(async () => { }).AsAsyncAction();
        }

        IAsyncOperation<IList<string>> IDoStuff.X()
        {
            return Task.Run<IList<string>>(async () =>
            {
                var data = await InternalStuff();
                return data;

            }).AsAsyncOperation<IList<string>>();
        }

        private async Task<IList<string>> InternalStuff()
        {
            return new System.Collections.Generic.List<string> { "Hallo" };
        }
    }
}

public async void clicked(object sender, RoutedEventArgs e)
{
    IDoStuff c = new Class1();
    await c.DoItAsync();


    var list = await c.X();
    foreach (var item in list)
    {
                
    }
}