When to use TaskEx.Run vs. TaskEx.RunEx

Question

I\'m trying to understand when to use TaskEx.Run. I have provided two code sample i wrote below that produce the same result. What i fail to see is why i would ta

Answer 1

Use TaskEx.Run when you want to run synchronous code in a thread pool context.

Use TaskEx.RunEx when you want to run asynchronous code in a thread pool context.

Stephen Toub has two blog posts related to the difference in behavior:

• Potential pitfalls to avoid when passing around async lambdas
• Task.Run vs Task.Factory.StartNew

This is only one of several options you have for creating tasks. If you do not have to use Run/RunEx, then you should not. Use simple async methods, and only use Run/RunEx if you need to run something in the background.