public class Class2
    {
        int? t,t1;

        public async Task<int?> TaskMethod2()
        {
            t1 = await Task.FromResult(printThreadId());
            return t1;
        }
        public async Task<int?> TaskMethod(){
            t = await Task.FromResult(printThreadId());
            return t;
        }
        public int? printThreadId()
        {
            int? t2 = Task.CurrentId;
            return t2;
         }
    }


   [TestFixture]
    public class RealFixture
    {
       [Test]
        public async void AsyncVoidFailure()
        {
            Task<int?> t = ob.TaskMethod2();
            await t;
            Assert.AreEqual( ob.TaskMethod(), t.Result);
        }
  }