The Parallel.For loop construct provided by Parallel Extensions is focused on providing a parallel alternative to the common sequential pattern of a for loop that iterates over a range of numbers. However, the for loop construct in a language like C# is not limited just to numbers and iterating over ranges.
In the June 2008 CTP of Parallel Extensions to the .NET Framework, we introduced the ContinueWith method on both Task and Future<T>. ContinueWith is, in effect, a callback, very much like events in .NET. With events, a causal action results in the event being raised,