Async Properties

1. Derive your view model from AsyncBindableBase:

   using Ditto.AsyncMvvm;
   
   class UniversalAnswerViewModel : AsyncBindableBase
   {
   }

2. Implement the asynchronous method for calculating the value of the property:

       private async Task<int?> GetAnswerAsync()
       {
           await Task.Delay(TimeSpan.FromDays(7500000 * 365.25));
           return 42;
       }

3. Define the property:

       public int? Answer
       {
           get { return Property.Get(GetAnswerAsync); }
       }

Done!