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ASP.NET MVC 4 Bug: HttpParseException: Unexpected "this" keyword after "@" character.

After upgrading an ASP.NET MVC 3 project to ASP.NET MVC 4, my page failed to load with the following error message:

HttpParseException: Unexpected "this" keyword after "@" character. 

Here is the failing code block. The exception occurs on line 5:

This seems to be a bug in Razor V2 as mentioned here: http://aspnetwebstack.codeplex.com/workitem/458. The ASP.NET team decided not to fix this, so you have to use a workaround.

By adding some extra ‘()’ the error goes away:

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