Graceful console app cancellation on Ctrl+C

Cancellation.cs

class Program
{
    static async Task Main(string[] args)
    {
        // Add this to your C# console app's Main method to give yourself
        // a CancellationToken that is canceled when the user hits Ctrl+C.
        var cts = new CancellationTokenSource();
        Console.CancelKeyPress += (s, e) =>
        {
            Console.WriteLine("Canceling...");
            cts.Cancel();
            e.Cancel = true;
        };
        
        await DoSomethingAsync(cts.Token);
    }
}

Meh, CTS won't leak memory unless you create it linked to another, longer-lived CTS. That, and the fact that there is exactly one of these that lasts the whole life of the process, gives you 3 reasons to not care in this particular case. But ya, disposing the CTS is harmless as long as you do it at process exit time.

Well, finally convinced of these words