Brief explanation of Async/Await in .Net 4.5

Question

How does Asynchronous tasks (Async/Await) work in .Net 4.5?

Some sample code:

private async Task TestFunction()
{
  var x = await DoesSom         


        

Answer 1

It executes after the first await returns. If this thing confuses you, try to play around with breakpoints - they are fully supported by the new async pattern.

Imagine it would look like this:

var x = await GetSomeObjectInstance();
var y = await GetSomeObjectInstance2(x);

There probably would occur a NullReferenceException somewhere, so the first await has to return first. Otherwise, x would be null/undefined or whatever.