How to keep Visual Studio debugger visualizers from timing out?

HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\9.0\Debugger

I think this is not documented, but you can try changing some of the Timeouts in the above registry key, and restart Visual Studio.

I was recently hit by this in VS2012 and after googling I found this:

As the exception message says, this exception means the debugger visualizer for the datatable is timed out. In VS debugger, each expression evaluation windows(such as watch window, locals window, datatips, autos window etc..) has different default max expression evaluation timed out value. For datatip, we prefer to give a short time out value because otherwise it will provide a poor user expression. If you do want to use the visualizer functionality for that datatable, you may add the expression to a watch and try to visualize it.(Because watch window has a longer timeout value). If you do want to get rid of this timeout in datatip, you may try to increase the timeout value for datatip. The timeout value is a setting in "DataTipTimeout" registry key under: HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\10.0\Debugger Note: you should probe WOW64Node for 64bit OS. You can also see other windows' default timeout value under this key.