Cancel C# 4.5 TcpClient ReadAsync by timeout

Question

What would the proper way to cancel TcpClient ReadAsync operation by timeout and catch this timeout event in .NET 4.5?

TcpClient.ReadTimeout seems to be applied to

Answer 1

Edit: the following gist is a workaround I did for this. https://gist.github.com/svet93/fb96d8fd12bfc9f9f3a8f0267dfbaf68

Original:

I really liked the answer from Khalid Omar and did my own version of it which I thought was worth sharing:

public static class TcpStreamExtension
{
    public static async Task ReadAsyncWithTimeout(this NetworkStream stream, byte[] buffer, int offset, int count)
    {
        if (stream.CanRead)
        {

            Task readTask = stream.ReadAsync(buffer, offset, count);
            Task delayTask = Task.Delay(stream.ReadTimeout);
            Task task = await Task.WhenAny(readTask, delayTask);

            if (task == readTask)
                    return await readTask;

        }
        return 0;
    }
}

It is more or less the same thing except slightly differently formatted in a way that is more readable (to me), and more importantly it does not use Task.Run I wasn't sure why it was used in his example.

Edit:

The above may seem good in a first glance but I found out it causes some problems. The readAsync call seems to leak if no data comes in, and in my case it seems that it reads a later write and the data is essentially returned within a place in memory no longer used.