Understand alternatives for calling methods asynchronously in .NET.

Question

What is the difference between calls to .NET methods asynchronously with:

• BeginInvoke / EndInvoke

against.

• IAsynchResult

against.

• A specific object is asynchronous methods (for example, WebClient)

I assume that the difference between the first two and the third is that some objects (in this case WebClient) support asynchronous calling through special methods, so there is no need to use BeginInvoke or IAsynchResult approaches?

Answer 1

. BeginInvoke IAsyncResult, EndInvoke . , , ( , ).