I am working on a project in Visual Studio 2008. Whenever I right-click on a project and select "Properties", the properties page starts to load, then i get the following error...

An error occurred trying to load the page.
COM object that has been separated from its underlying RCW cannot be used.

Apparently this is caused by a MS plugin used in ReSharper. After a little Googling, I found that it is a bug in Microsoft Source Analysis for C#.

Here is a description of the problem. 

MS have released an updated version of StyleCop that has a fix in it. shut down Visual Studio, download this and when you start up VS again, the problem will be fixed.

StyleCop 4.3 release Page:
https://code.msdn.microsoft.com/Release/ProjectReleases.aspx?ProjectName=sourceanalysis&ReleaseId=1425

Microsoft Page Detailing The Problem:
http://code.msdn.microsoft.com/WorkItem/View.aspx?ProjectName=sourceanalysis&WorkItemId=9&wa=wsignin1.0

Good Luck.