Update README.md

LimitedConcurrencyAsync/README.md

@@ -1,5 +1,4 @@
-LimitedConcurrencyAsync sample
----
+#LimitedConcurrencyAsync sample
 
 This sample shows how the async function support can be customised by using the .NET 4 Task-based functionality.
 In particular, we create a limited concurrency scheduler, that will restrict the number of async threads that are used to run Tasks.
@@ -10,21 +9,21 @@ When running, there should be two new functions in Excel - "Sleep" and "SleepPer
 
 Some details on the code:
 
-* AsyncFunctions.cs
+## AsyncFunctions.cs
 
 This is the user code part of the sample. A custom TaskScheduler and related TaskFactory is initialized, and some async Excel-DNA functions defined that will create Tasks using that TaskFactory.
 
 There are two versions of the Sleep function:
-** Sleep - different calls to Sleep with the same timeout parameter will be combined and run as the same Task.
-** SleepPerCell - calls from different cells will create separate Task, making the concurrency behaviour easier to see.
+  * Sleep - different calls to Sleep with the same timeout parameter will be combined and run as the same Task.
+  * SleepPerCall - calls from different cells will create separate Task, making the concurrency behaviour easier to see.
 
-* AsyncTaskUtil.cs
+## AsyncTaskUtil.cs
 
 This file contains some helpers to integrate the Task-based API with Excel-DNA async support. The main helper function is AsyncTaskUtil, which takes the async call identifiers (the callerFunctionName and callerParameters) as well as an Action<Task> that will create the async Task on the first call. Internally, an ExcelTaskObservable is created, which converts the Task completion result into the appropriate IObservable interface to register with Excel-DNA.
 
 There is also an overload that supports cancellation.
 
-* LimitedConcurrencyLevelTaskScheduler.cs
+## LimitedConcurrencyLevelTaskScheduler.cs
 
 This file is taken from the "Samples for Parallel Programming" on MSDN (https://code.msdn.microsoft.com/Samples-for-Parallel-b4b76364/sourcecode?fileId=44488&pathId=2044791305). There are a number of custom TaskScheduler samples, including a very flexible QueuedTaskScheduler. The TaskScheduler samples are discussed in detail by Stephen Taub here: http://blogs.msdn.com/b/pfxteam/archive/2010/04/09/9990424.aspx .