Sankra 

FermiContainer is a simple and easy to use IoC container. It supports registration of interfaces and implementing classes, and through constructor injection the dependencies known to the container are... More information

FermiContainer is a simple and easy to use IoC container. It supports registration of interfaces and implementing classes, and through constructor injection the dependencies known to the container are... More information

If you cannot use async and await, use AsyncMethodCaller to easily make asynchronous calls. The code becomes testable and it works perfectly in ViewModels.