To use the 'I' prefix for interfaces or not to

Question

That is the question? So how big a sin is it not to use this convention when developing a c# project? This convention is widely used in the .NET class library. However, I am not

Answer 1

Best practices override convention sometimes, in my opinion. While I may not personally like the convention, not using it goes against the best practice that has been in place for longer than I care to think about.

I would look at it more from the point of how other people do it, in this case. Since 99% of the common world will be prefacing with the "I", that is good enough to keep this best practice. If you have to bring in a contractor or on-board a new developer, you should be able to focus on the code and not have to explain/defend choices that you made.

It has been around long enough, and is ingrained well enough, that I don't expect it to change in my lifetime. It is just one of those "unwritten rules", better defined as an "unwritten best practice", that will probably outlive me.