"Class not Registered" Error

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Mendoza - 17 Apr 2008 23:08 GMT

I have a problem with VS 2008 where I cannot view the properties window for a
website project. If I select the Website project in Solution Explorer, and
try to view it's property pages, I get the following error.

Class Not Registered.
Looking for object with CLSID: {CFB39A2E-581A-47D1-B58E-95C24933BEF5}.

Any help would be much appreciated.

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Andy - 21 Apr 2008 16:05 GMT

Its unlikely to be a windows registry problem because one of the
features of .NET is that applications can search the current folder
from which they are launched for their dlls and assemblies without the
need of them being registered in the windows registry.

I don't have VS2008, but this looks like a variation on the theme of
Visual Studio trying to edit web projects through IIS. If your web
project isn't configured as a website on an IIS server, then Visual
Studio won't be able to access the project's files because it can't
find them.

I'm hoping that there is a way to make Visual Studio open all web
project files directly from the drive they reside on without going
through IIS, but I don't know how to do this..

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Mendoza - 21 Apr 2008 16:24 GMT

I don't think we've needed IIS since VS 2005. VS has it's own built-in web
server. So I can do everything else with my project files, and I can run and
debug the website just fine....but I cannot view the property pages., and I
just noticed that I can't open the "Start options" item from the context menu
for the website project either. The error is the same, with the same CLSID.
Does anyone know how to figure out what DLL this CLSID refers to?

> Its unlikely to be a windows registry problem because one of the
> features of .NET is that applications can search the current folder
[quoted text clipped - 10 lines]
> project files directly from the drive they reside on without going
> through IIS, but I don't know how to do this..

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"Class not Registered" Error

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