July 2015
Intermediate to advanced
1300 pages
87h 27m
English
Methods can be asynchronous, but so can lambda expressions. To be asynchronous, a lambda must have the Async modifier and must return Task or Task(Of T), but it cannot accept ByRef arguments and cannot be an iterator function. A lambda can be asynchronous when its code uses the Await operator to wait for a Task result. An example of asynchronous lambdas is with event handlers. For instance, you might need to wait for the result of a task when an event is raised, as in the following code snippet that handles a button’s Click:
AddHandler Me.Button1.Click, Async Sub(sender, e) Await DoSomeWorkAsync End Sub
You do not need an ...