what is the usage of custom pipeline in biztalk server 2010/

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C#

hi friends,



any body know the usage of custom pipeline and how to add it into toolbox, after

adding that custom pipeline how to use it in receive or send pipeline/


first i need the what is IBaseComponent,IComponent,SaveStreamToFile,IPersistPropertyBag,IComponentUI interfaces?

why these thing at all we need to create custom pipeline?

with the help of custom pipeline what we can do differently ?

waiting for reply,
thanks in advance.