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Marc Clifton wrote:

ok, when the continuation returns here, then it returns here, then it returns here...but what happens when an exception is thrown...

Ping ping = new Ping();
try
{
    // Block the calling thread waiting for the reply...
    PingReply reply = ping.Send(address);
    
    // Now do something with the reply...
}
catch (PingException)
{
    // Handle the exception...
}

Ping ping = new Ping();

// Can't declare the handler on one line, since you need to remove it from within itself...
PingCompletedEventHandler handler = null;
handler = (sender, e) =>
{
    ping.PingCompleted -= handler;
    
    if (e.Error != null)
    {
        PingException ex = e.Error as PingException;
        if (ex == null) throw new TargeInvocationException("Error", e.Error);
        
        // Handle the exception...
    }
    else
    {
        PingReply reply = e.Reply;
        
        // Now do something with the reply...
    }
};

// Need to wire up the handler before calling the method...
ping.PingCompleted += handler;

// The calling thread will not be blocked...
ping.SendAsync(address);

Ping ping = new Ping();

// The calling thread will not be blocked...
Task<PingReply> pingTask = ping.SendPingAsync();

// But everything else has to move to a continuation...
Task resultTask = pingTask.ContinueWith(task =>
{
    if (task.IsFauled)
    {
        AggregateException ex = task.Exception;
        ex.Handle(error =>
        {
            PingException pingEx = error as PingException;
            if (pingEx == null) return false;
            
            // Handle the exception...
            return true;
        });
    }
    else
    {
        PingReply reply = task.Result;
        
        // Now do something with the reply...
    }
});

Ping ping = new Ping();
try
{
    // The calling thread will not be blocked...
    PingReply reply = await ping.SendPingAsync(address);
    
    // Now do something with the reply...
}
catch (PingException)
{
    // Handle the exception...
}

Brady Kelly wrote:

Mr. Skeet

Munchies_Matt wrote:

(going for the 'how low a response can a post get' record)

Brady Kelly wrote:

English speakers use, "Sorry?" to get someone's attention