Task Timeout Examples

1.

public static async Task<TResult> WithTimeout<TResult>(this Task<TResult> task, TimeSpan timeout)
{
    if (task == await Task.WhenAny(task, Task.Delay(timeout)))
    {
        return await task;
    }
    throw new TimeoutException();
}

try
{
    await DoStuffAsync().WithTimeout(TimeSpan.FromSeconds(5));
}
catch (TimeoutException)
{
    // Handle timeout.
}
public static Task<TResult> WithTimeout<TResult>(this Task<TResult> task, TimeSpan timeout)
{
    var timeoutTask = Task.Delay(timeout).ContinueWith(_ => default(TResult), TaskContinuationOptions.ExecuteSynchronously);
    return Task.WhenAny(task, timeoutTask).Unwrap();
}
2.
var cts = new CancellationTokenSource(TimeSpan.FromSeconds(3));

var task = Task.Run(() => DoStuff()).WithCancellation(cts.Token);
3.
public Task DoStuffAsync(CancellationToken cancellationToken)

..........

CancellationTokenSource cancellationSource = new CancellationTokenSource();
Task timeoutTask = Task.Delay(3000);

if(await Task.WhenAny(DoStuffAsync(cancellationTokenSource), timeoutTask) == timeoutTask)
{
     cancellationSource.Cancel();

     throw new TimeoutException();
}
4.
var client = new TcpClient();
if (!client.ConnectAsync("remotehost", remotePort).Wait(1000))
{
    // connection failure
}