ValidateUsingNetworkTime

[nielstanghe]

I've encountered a problem while testing the network time validation. My test:

• The license-file that I was testing was already expired
• I've set my clock to a day before the license expire date
• Loading the license and calling 'AssertValidLicense'

When I noticed that I didn't get any exception, I started digging..
I noticed that the exception gets lost in the sntp.BeginGetDate-thread. I don't know if i'm doing something wrong, but to continue my testing I've added a quick fix (I'm struggling with inserting code, but you'll get the point):

`
private void ValidateUsingNetworkTime()
{
if (!NetworkInterface.GetIsNetworkAvailable())
return;

        bool isLicenseValid = true;
        ManualResetEvent timeRequestDone = new ManualResetEvent(false);

        var sntp = new SntpClient(GetTimeServers());
        sntp.BeginGetDate(time =>
        {
            if (time > ExpirationDate)
                isLicenseValid = true;

            timeRequestDone.Set();
        }
        , () =>
        {
            /* ignored */
        });

        timeRequestDone.WaitOne();
        if (!isLicenseValid)
            RaiseLicenseInvalidated();

    }`