#39 Switch to using Async for Sending and Recieving ICMP packets

[Anonymous]

Originally created by: Killeroo

At the moment RecieveFrom (line 96 Ping.cs) blocks thread so exitEvent can't be checked and Listening results can't be displayed. Fix would be to switch RecieveFrom to BeginRecieve Async setup so we can check for exit event at any time (instead of only when the socket recieves something)

Use following example for guidence:
https://msdn.microsoft.com/en-us/library/dxkwh6zw(v=vs.110).aspx

[Anonymous]

Originally posted by: Killeroo

Also switch listening to use async so we can check for exitEvent