Why can I not use Asp.Net DataAnnotation Validation with VS 2008

I have a problem. I am developing Asp.Net MVC2 Application with VS2008 very well, but now I want to use the amazing DataAnnotion Validation shipping with Microsoft.MVC.DataAnnotation.dll. I can't find the DLL so I found it on the project Site @ http://aspnet.codeplex.com/releases/view/24471#DownloadId=61772

I can't compile the Project. Is it a VS 2010 or .Net 4.0 thing ? Do I need VS 2010 or is there a way to use it wi开发者_JS百科thin VS2008 ?

Thanks a lot guys, sorry about my bad English ;)

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You don't need VS2010, you can use Data Annotations with VS2008 and .net 3.5

The example above actually works in VS2008. I just verified it.

Also the dll you mentioned above is the wrong dll for MVC2, instead of Microsoft.MVC.DataAnnotation.dll, you want System.ComponentModel.DataAnnotations which should be part of .net 3.5.

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follow this guide: http://stephenwalther.com/blog/archive/2008/09/10/asp-net-mvc-tip-43-use-data-annotation-validators.aspx

maybe you just need to service pack your vs