Asynchronous iterator Task>

Question

I’m trying to implement an asynchronous function that returns an iterator. The idea is the following:

    private async Task> T         


        

Answer 1

A more "batteries-included" implementation of this kind of thing, including language support, is now available as of C# 8.0.

Now, when using at least C# 8.0 (or higher) with .NET Standard 2.1 (or higher) and/or .NET Core 3.0 (or higher), the code from the original question may be written as follows:

private async IAsyncEnumerable TestAsync(string testString)
{
    foreach (char c in testString.ToCharArray())
    {
        // do other work, which may include "await"
        yield return c;
    }
}