Difference between the different DuplexChannelFactory<TChannel> constructors

what is the difference between the three following constructors, and when do i use each of them. sorry for this basic question :

• DuplexChannelFactory(InstanceContext)
• DuplexChannelFactory(Object)
• DuplexChannelFactory(Type)

http://msdn.开发者_C百科microsoft.com/de-de/library/ms585874.aspx

Thanks!

regards

thomas