ASP.NET MVC 2 Code Sharing

I have a solution which contains 2 MVC Website Applications (Website & Website Admin System). As I am progressing with the build there is a lot of common code especially in my View Models, HtmlHelpers etc. Is it good practice in MVC to treat these two sites as separate entities and keep code in one site specific to that site and manu开发者_StackOverflow社区ally copy code across to second site? Or is there a practice to share this common code across web apps?

It is just natural for me to refactor common code when I see it? However I am not so sure how this works within an MVC environment. Any suggestions or comments welcome.

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You can create a class library project and push that code to that project. Then have both website projects reference that DLL. I believe views are about the only thing in MVC that you can't do that with. I believe you can do it with controllers too, but I haven't tried it.

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If your sites are sharing many ViewModels and HtmlHelpers I'd take a step back and examine why they are two separate sites. Is the second one an Admin area of the first site, or is it a completely separate entity altogether? If the first, I'd probably have everything in one site. If the second, I'd do as Brian Ball suggested and create a library project that the two sites share.