Pseudocode for async/await keywords C# with Example

Consider a simple asynchronous method: 
async Task Foo() 
{ 
Bar(); 
await Baz(); 
Qux(); 
} 
Simplifying, we can say that this code actually means the following: 
Task Foo() 
{ 
Bar(); 
Task t = Baz(); 
var context = SynchronizationContext.Current; 
t.ContinueWith(task) => 
{ 
if (context == null) 
Qux(); 
else 
context.Post((obj) => Qux(), null); 
}, TaskScheduler.Current); 
return t; 
} 
It means that async/await keywords use current synchronization context if it exists. I.e. you can write library code 
that would work correctly in UI, Web, and Console applications. 
Source article.