Canceling a task.cs

using System;
using System.Threading;
using System.Threading.Tasks;
					
public class Program
{
	public static void Main()
	{
		Program.MainAsync().Wait();
	}
	
	private static async Task MainAsync()
	{
		var myService = new MyService();
		var cancellationTokenSource = new CancellationTokenSource();
		var token = cancellationTokenSource.Token;
		var task = myService.SomeLongOperation(token);
		cancellationTokenSource.CancelAfter(1000);
		
		try
		{
			await task;
		}
		catch(Exception ex)
		{
			Console.WriteLine(ex.ToString());
			Console.WriteLine($"Task.IsCanceled: {task.IsCanceled}");
			Console.WriteLine($"Task.IsFaulted: {task.IsFaulted}");
			Console.WriteLine($"Task.Exception: {((task.Exception == null) ? "null" : task.Exception.ToString())}");
		}
	}
}

public interface IMyService
{
	Task SomeLongOperation(CancellationToken cancellationToken);
}

public class MyService : IMyService
{
	public async Task SomeLongOperation(CancellationToken cancellationToken)
	{
		for(var i = 0; i < 100; i++)
		{
			Console.Write(".");
			await Task.Delay(100);
			cancellationToken.ThrowIfCancellationRequested();
		}
	}
}