What are the best practices for using Extension Methods in .Net?

What are the best practices for using Extension Methods in .Net?

"I have seen these being used every which way, and have been accused of using them the wrong way (though in that case, I was using them that way to demonstrate a point).

So, what do you think are the best practices for employing Extension Methods?

Should development teams create a library of extension methods and deploy them across various projects?

Should there be a collection of common extension methods in the form of an open source project?

Update: have decided to create an organization wide extension methods library"

Asked by: Guest | Views: 493

Total answers/comments: 4

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Guest [Entry]

you might want to take a look at http://www.codeplex.com/nxl and http://www.codeplex.com/umbrella which are both extension method libraries. I personally haven't had a look at the source code but I'm sure the guys there would be able to give you some good pointers.

Guest [Entry]

"I've been including my extension methods in with my Core libraries in the Utils class because people who are working with my framework are likely to find the methods useful, but for mass deployment where the end developer might have a choice of extension method libraries, I would advise putting all of your extensions into their own namespace, even their own project file, so that people can choose to add a reference or a using statement or simply where required, like so:

Core.Extensions.Base64Encode(str);

My Utils class is my bestest friend in the whole world, it was before extension methods came along and they have only helped to strengthen our relationship. The biggest rule I would go by is to give people choice over what extension framework they are using where possible."

Guest [Entry]

"The Objective-C language has had ""Categories"" since the early 1990s; these are essentially the same thing as .NET Extension Methods. When looking for best practices you might want to see what rules of thumb Objective-C (Cocoa & NeXT) developers have come up with around them.

Brent Simmons (the author of the NetNewsWire RSS reader for Mac OS X and iPhone) just posted today about his new style rules for the use of categories and there's been a bit of discussion in the Cocoa community around that post."

Rlprjk [Entry]

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