Why all interfaces in CLR start with I ?

Hi,

Readability, I guess.

C#, unlike Java, doesn't use the "extends"/"implements" keyword, but Java doesn't prefix its interfaces with "I".

So if you've got this:

class MyClass : Foo

...you've got no idea if Foo is a class or an interface.

The other reason is some kind of developer-friendly convention with COM which also had the IInterface scheme, but didn't do the same with other types. .NET builds on COM (in a way), so it's only natural to keep some of the naming system.

W3bbo said:

Readability, I guess.

C#, unlike Java, doesn't use the "extends"/"implements" keyword, but Java doesn't prefix its interfaces with "I".

So if you've got this:

class MyClass : Foo

...you've got no idea if Foo is a class or an interface.

The other reason is some kind of developer-friendly convention with COM which also had the IInterface scheme, but didn't do the same with other types. .NET builds on COM (in a way), so it's only natural to keep some of the naming system.

I think it's more your second reason than your first.  MS had all these developers using COM and to get them to switch to .NET they had to maintain some similarity.

VB still has separate keywords for it: inherits and implements.

Though it's not quite an answer here's a blog post from Brad Adams on the matter, maybe it helps:

http://blogs.msdn.com/brada/archive/2004/02/03/67033.aspx

Dexter said:

Though it's not quite an answer here's a blog post from Brad Adams on the matter, maybe it helps:

http://blogs.msdn.com/brada/archive/2004/02/03/67033.aspx

Thanks for thinking

ido.ran said:

Dexter said:

*snip*

It all sound right, but the reality is that today tools, specifically IDEs, can give us all the information we need, all with hover of a mouse (no click involve).

Object Oriented primary goal is to make programming language more human-like, and I don't see human call their dog name that start with "D" nor we name our street with "S".

We understand the type of thing we talk about by its context, and if we don't understand we ask (hover with the mouse).

In a new project I'm working on I stop putting "I" before every interface and I think my code is much cleaner and easy to understand and use.

It's sound wired at start, but it getting right after a while.

Thanks for thinking