C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
					
public class Program
{
	public async static Task Main()
	{
		/*
		var list = new Task[5];
		
		for (var i = 0; i < 5; i++)
		{
			list[i] = DoSmth(i);
		}	
		
		Task.WaitAll(list);
		
		
		Parallel.For(0, 10, (idx) => {
			DoSmth(idx);
		});
		*/
		
		await Do();
		
		Console.WriteLine("main done");
	}
	
	private static async Task Do()
	{
		var list = new Task[5];
		
		for (var i = 0; i < list.Length; i++)
		{
			list[i] = DoSmth(i);
		}
		
		await Task.WhenAll();
	}
	
	private static async Task LoadSmth() => await Task.Run(() => Thread.Sleep(300));
	
	private static async Task ReadSmth() => await Task.Run(() => Thread.Sleep(100));
	
	private static async Task DoSmth(int idx)
	{
		await LoadSmth();
		
		await ReadSmth();
		
		Console.WriteLine($"{idx} done");
	}
}

 
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
                    
public class Program
{
    public async static Task Main()
    {
        /*
        var list = new Task[5];
        
        for (var i = 0; i < 5; i++)
        {
            list[i] = DoSmth(i);
        }   
        
        Task.WaitAll(list);
        
        
        Parallel.For(0, 10, (idx) => {
            DoSmth(idx);
        });
        */
        
        await Do();
        
        Console.WriteLine("main done");
    }
    
    private static async Task Do()
    {
        var list = new Task[5];
        
        for (var i = 0; i < list.Length; i++)
        {
            list[i] = DoSmth(i);
        }
        
        await Task.WhenAll();
    }
    
    private static async Task LoadSmth() => await Task.Run(() => Thread.Sleep(300));
    
    private static async Task ReadSmth() => await Task.Run(() => Thread.Sleep(100));
    
    private static async Task DoSmth(int idx)
    {
        await LoadSmth();
        
        await ReadSmth();
        
        Console.WriteLine($"{idx} done");
    }
}

Compilation error (line 18, col 52): The type or namespace name 'List' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 18, col 65): Cannot initialize object of type 'List<object>' with a collection initializer
Compilation error (line 19, col 21): The name 'HttpContext' does not exist in the current context
Compilation error (line 20, col 21): The name 'HttpContext' does not exist in the current context
Compilation error (line 21, col 21): The name 'HttpContext' does not exist in the current context
Compilation error (line 25, col 22): The name 'HttpContext' does not exist in the current context
Compilation error (line 26, col 17): The name 'HttpContext' does not exist in the current context
Compilation error (line 27, col 22): The name 'HttpContext' does not exist in the current context
Compilation error (line 30, col 22): The name 'HttpContext' does not exist in the current context
Compilation error (line 31, col 22): The name 'HttpContext' does not exist in the current context

Last Run:	11:00:48 pm
Compile:	0s
Execute:	0.112s
Memory:	0b
CPU:	0s

View IL Code