How to quickly cancel a blocked Read call in HTTP(S)

Question

I want to cancel a Read call that has a very long delay after establishing an HTTP connection.

Will it be possible to cancel quickly using Cancellation.Register(() => stream.Close()) as shown below?

Please let me know if there is a correct cancellation method.

Current method in use (simplified)

try
{
    var stream = response.GetResponseStream();
    using var registration = canceltoken.Register(()=> stream.Close());
    while(canceltoken.IsCancellationRequested == false)
    {
        var data = stream.Read(buffer, 0, length);
        ...
    }
}
catch(Exception) when (cancelToken.IsCancellationRequested)
{
    canceled = true;
}
catch(Exception ex)
{
    error = ex.Message;
}