ICustomFormatter Vs. IFormattable

[Jason McBurney]

I am looking at these two different interefacing sytems within the framework, ICustomFormatter and IFormattable, and I trying to digest the pros and cons of each. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconcompositeformatting.asp[^] Discusses some of the ordering differences, but I would like your opinions! What is the differnce in this two interfaces? do you need to investigate an online backup[^] company