You can do this with Visual Studio templates for specific types. In your instance, you must change the default element template for the class, however it has a fine-grained structure, and you can relate to several types, that is ... an interface, etc.
If you want to customize the project template, which can be found in ...
...Program Files\Microsoft Visual Studio 10.0\Common7\IDE\ProjectTemplates\Web\CSharp
VS seems to be extracting from the corresponding template cache folders to move them from the template folder to the template cache folder, launch VS using devenv /installvstemplates
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