using System;

using System.Linq;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        Console.WriteLine("Sync");

        var syncFunc = MyAlgorithm.DoAlgorithm<string, string>(s => "Hello, " + s );

        syncFunc(["Matt", "Lilly"]).Dump();

        Console.WriteLine("ASync");

        var asyncFunc = MyAlgorithm.DoAlgorithm<string, Task<string>>(s => Task.FromResult("Hello, " + s) );

        var results = await Task.WhenAll(asyncFunc(["Matt", "Lilly"]));

        results.Dump();

    }

}

​

public static class MyAlgorithm

{

    public static Func<TInput[], TOutput[]> DoAlgorithm<TInput, TOutput>( Func<TInput, TOutput> stepFunc )

     => input => {

            return input.Select(i => stepFunc(i)).ToArray();

        };  

}