Correct way to close WCF 4 channels effectively

Question

I am using the following ways to close the WCF 4 channels. Is this right way to do it?

using (IService channel 
    = CustomChannelFactory<IService>.CreateConfigurationChannel())
{
    channel.Open();

    //do stuff
}// channels disposes off??

Answer 1

Although not strictly directed at the channel, you can do:

ChannelFactory<IMyService> channelFactory = null;
try
{
    channelFactory =
        new ChannelFactory<IMyService>();
    channelFactory.Open();

    // Do work...

    channelFactory.Close();
}
catch (CommunicationException)
{
    if (channelFactory != null)
    {
        channelFactory.Abort();
    }
}
catch (TimeoutException)
{
    if (channelFactory != null)
    {
        channelFactory.Abort();
    }
}
catch (Exception)
{
    if (channelFactory != null)
    {
        channelFactory.Abort();
    }
    throw;
}