public static class TimeoutExtensions
{
     private static void ExecuteTimeoutCommon(Task actionTask, TimeSpan maxDelay)
     {
         var delayTask = Task.Delay(maxDelay);
         var finishedTaskIndex = Task.WaitAny(actionTask, delayTask);
         if (finishedTaskIndex != 0)
         {
             throw new TimeoutException("Action did not finish in the desired time slot.");
         }
     }

     public static void ExecuteTimeout<T>(Func<T> func, TimeSpan maxDelay)
     {
         var executionTask = Task.Run(() =>
         {
             func();
         });
         ExecuteTimeoutCommon(executionTask, maxDelay);
     }

     public static void ExecuteTimeout(Action action, TimeSpan maxDelay)
     {
         var executionTask = Task.Run(() =>
         {
             action();
         });
         ExecuteTimeoutCommon(executionTask, maxDelay);
     }
}

TimeoutExtensions.ExecuteTimeout(Console.ReadLine, TimeSpan.FromSeconds(3));