Naming style for Interfaces

Question

Looking at the INotifyPropertyChanged interface i am wondering if the style for naming interfaces should also allow the "IDoThis"-style. Most interfaces seem to be named in the "I am" style, ie "IEqualityComparer" or "IPersistable".

Are there more examples of the first naming-variant in the .NET base libs?

And are there updates to the C# naming guidelines I missed, as the MSDN still states:

"Name interfaces with nouns or noun phrases, or adjectives that describe behavior"

The background is a clash of naming conventions in the current project where I am arguing that "IDoThis"-interfaces should be renamed to fall in line with common naming conventions of the framework.

Answer 1

I think your example is an exception, as there isn't a concise noun, noun phrase or adjective that's as expressive ( IPropertyChangingNotifier is a mouthful)

Another exception from the framework is INormalizeForIsolatedStorage (better than INormalizeableForIsolatedStorage ).

Answer 2

I must admit, I've never felt the need to use verb or verb-noun suffixes for interface names. Most of the time, a noun or adjective suffices as the guideline describes.

Given that an interface is typically a collection of methods and properties, the use of a IVerb or IVerbNoun type name would be non-sensical most of the time.

Do you have any examples of IVerb or IVerbNoun interface names that you're using at the moment?