Big thanks to ThatOneDeveloper! His post about fixing ASP.Net debugger was a big help.
http://development.thatoneplace.net/2009/04/breakpoint-will-not-currently-be-hit.html
“The breakpoint will not currently be hit. The source code is different then the original version”
…
So to fix the problem:
- Close out Visual Studio and make sure any instances of ASP.NET development server are closed as well.
- Delete everything from “C:\Windows\Microsoft.NET\Framework\v.2.0.50727\Temporary ASP.NET Files” (where v.2.0.50727 is the version of the .NET Framework your site is running on.)

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