How to ContinueWith another function with result from previous task when using Tasks?

Question

I have WCF connector that should get some small amount of data for me, usually it takes up to 20 seconds to get this data for each item ( which is fine ). I want to use Task

Answer 1

In the example below previousTask references the previous task, use the Result property to get the return value from it.

Task task = Task.Factory.StartNew(() =>
{
   // Background work
   return ipVersionCounters;
}).ContinueWith((previousTask) => 
{
   var ipVersionCounters = previousTask.Result;
});

Update

If you want the continuewith to execute on the UI thread use (If you are starting on the UI thread) ...

Task.Factory.StartNew(() =>
{
  // Background work
}).ContinueWith((previousTask) => {
  // Update UI thread
}, TaskScheduler.FromCurrentSynchronizationContext());

(which was taken from this answer for more info)