Are you running Debug or Release mode bits?

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Have you ever wanted to know if a compiled assembly was compiled in Debug or Release mode? I know I have.

I came across a post on Computer Zen today that shows exactly how to do this. There is also a similar tool written by Jeff Key, called IsDebug.

For my part, I always make sure that the following snippet of code is in my AssemblyInfo.cs

#if (Debug || DEBUG)
[assembly: AssemblyConfiguration("Debug")]
[assembly: AssemblyConfiguration("Release")]

This attribute doesn’t show up in the file properties (when viewed from Explorer) but it can be queried programmatically.