Debug and View Expressions in VS 2013

1 ביולי 2014

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Expressions are important constructs and working with them provides lots of capabilities. Unfortunately they are difficult to view and debug vith Visual studio.

Li Chen found a way to use the good old Expression tree visualizer to solve this.

Expression tree visualizer, as the name indicates, is a Visual Studio visualizer for visualizing expression trees. It is a must if you work with expressions frequently. Expression Tree Visualizer is a Visual Studio 2008 sample. There is a Visual Studio 2010 port available on codeplex. If you want to use it with a later version of Visual Studio, there is not one available. Fortunately, porting it to another version of Visual Studio is fairly simple:

  1. Download the original source code from
  2. Replace the existing reference to Microsoft.VisualStudio.DebuggerVisualizers assembly to the version in the Visual Studio you want to work with. For Visual Studio 2013, I found it in C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\ReferenceAssemblies\v2.0\Microsoft.VisualStudio.DebuggerVisualizers.dll on my computer.
  3. Compile the ExpressionTreeVisualizer project and copy ExpressionTreeVisualizer.dll to the visualizer directory. To make it usable by one user, just copy it to My Documents\VisualStudioVersion\Visualizers. To make it usable by all users of a machine, copy it to VisualStudioInstallPath\Common7\Packages\Debugger\Visualizers.

If you do not want to walk through the process, I have one you can find one available at


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