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$env=0

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Winning the award for the least understandable UI metaphor: the ability to view the environment variables in the target when native debugging.  This is yet another tiny undocumented feature of the native expression evaluator in VS.  $env falls under the same extravagant disclaimer from the @clk post.

 

Place $env in the watch window and you get … the size in bytes of your environment block. 

 

Wow.

 

Far more useful is to type "$env=0", which evaluates to "0", and dumps all the Environment Variables to the output window.  If you use the Immediate window "?$env=0" you get everything inline.  The feature requires you to be native (or interop) debugging and to evaluate it from a native frame.  

 

Despite the insane UI interaction, the end result is very useful information.

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