async gotchas

Program.cs

using System;
using System.Threading.Tasks;
					
public class Program
{
	public static async Task Main()
	{
		var t1 = MethodAsync();
		// await Task.Delay(/*0*/1).ConfigureAwait(false);
		var t2 = MethodAsync();

		await Task.WhenAll(t1, t2);
	}

	async static Task MethodAsync()
	{
		Console.WriteLine($"Id: {Thread.CurrentThread.ManagedThreadId}");
		for(int i = 0; i < 10; i++)
		{
			// await Task.Delay(/*0*/1);
			Console.WriteLine(i);
		}
	}
}