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c#taskactionfunc

Is there a way to take a synchronous method that may or may not return a value and add it to a List<Func<Task>>?

In the process of refactoring some legacy code at work and part of it is to convert an instance of List<Action> to List<Func<Task>>. Elsewhere in the codebase, there are several instances of something along the lines of this:

entity.Tasks.Add(() => 
{
    _service.Process(operation)
}

The above would work fine when the Tasks property was List<Action>, but gives errors when turned into List<Func<Task>> with no obvious way to fix it.

I know next to nothing about Func, Task, Action, asynchronous/synchronous programming, particularly in C#. Any help provided is immensely appreciated or even just a referral to information where I could find the information needed to solve this myself.

Solution

  • What you have to do is to create a function that returns a Task. A solution could be creating a task that internally executes your synchronous code and then add it to the list. Like this:

    entity.Tasks.Add(() => Task.Run(_service.Process(operation)));

    Just note that the code only creates a function that returns a Task but the Task won't be executed until you ask for it.

    Here is more info about the topic: