Zero install debugging version of Visual Studio
It would be great if you could run a small version of just the debugger from Visual Studio on a USB key or network share in order to more easily debug issues on production machines without installing Visual Studio or setting up remote debugging.
Ace Olszowka commented
You might want to also take a look at this idea to bring back the CLR Debugger which was almost exactly what you want from a Managed Code Standpoint: http://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/6383887-bring-back-the-clr-debugger
Thank you for submitting your idea. I have updated the category for this feature request to 'Debugger' so that it can be evaluated by the correct product team.
Visual Studio Program Manager
Great idea. Remote debugging is not always practical.