Why prefix C# interface names with an “I”

Question

What is the rationale behind this naming convention?

I don\'t see any benefit. The extra prefix just pollutes the API.

My thinking is inline with Konrad\'s respo

Answer 1

I seems to traditional convention from Hungarian Notation. Interface Naming Guidelines says "Prefix interface names with the letter I, to indicate that the type is an interface." Framework Design Guidelines also says "DO prefix interface names with the letter I, to indicate that the type is an interface."

It is just a coding convention, So it's to hard to determine good or bad. Important things is consistency.