The DEBUG constant in Visual Studio 2012 won't activate

Question

Trying to use the ifdef DEBUG constant in Visual Studio doesn't work for me in a .NET Framework 4.5, ASP.NET MVC 4.

I made sure:

• The "Define DEBUG constant" is checked for the Debug configuration in project properties
• The Web.config does include the <compilation debug="true"...

The code I use to verify shows isDebug = false, both in the IDE and in runtime, even though i run under the Debug-configuration:

bool isDebug;
#if DEBUG
    isDebug = true;
#else
    isDebug = false;
#endif

This is a screen cap of Visual Studio, showing i have the Debug-configuration active, but in the code, the color highlighting says that DEBUG is not defined.

I must be missing something!

Edit: Screen cap of what the properties window shows for the Build-view:

Answer 1

No. You cannot check the DEBUG constant with #if DEBUG in a file with extension .cshtml