Its import how a Task is working. There are many ways to run asynchron operations. Sometimes you also need return values from a Task or you want to cancel/stop the Task clean. For how to cancel a task please read the section for Cancellation Token.
More informations you can find on MSDN. http://msdn.microsoft.com/en-us/library/dd537609%28v=vs.110%29.aspx
Here you can see a codesnippet how easy it is to deal with Tasks.