Ex, C# - rextester

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            RunThisFunction(DummyMethodA);
            RunThisFunction(DummyMethodB);
            RunThisFunction(DummyMethodC);
        }
        
        public static Task DummyMethodA()
        {
            throw new NotImplementedException();
        }
        
        public static Task<string> DummyMethodB()
        {
            throw new NotImplementedException();
        }
        
        public static Task<int> DummyMethodC()
        {
            throw new NotImplementedException();
        }
        
        public static Task RunThisFunction(Func<Task> func)
        {
            Console.WriteLine("No type argument");
            return Task.CompletedTask;
        }
        
        public static Task<TTaskArg> RunThisFunction<TTaskArg>(Func<Task<TTaskArg>> func)
        {
            Console.WriteLine($"{typeof(TTaskArg).Name} as argument.");
            return Task.FromResult<TTaskArg>(default);
        }
    }
}

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Compilation time: 1.9 sec, absolute running time: 0.36 sec, cpu time: 0.23 sec, memory peak: 38 Mb, absolute service time: 2,36 sec