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Please remove the previous version, then attempt to install the newer one.

ReSharper does not work just after installation; VS.NET


shows an error message like 'The add-in ... failed to load or caused an exception'.

The most probable reason is that the ReSharper dlls failed to register for COM interop, so VS.NET cannot load them.


Normally these are copied to the 'PrivateAssemblies' automatically and you don't need to worry about it. Anyway, if you still get the exception on startup please make sure that the specified assemblies are in 'PrivateAssemblies' folder.

VS.NET 2003 only: After installation of ReSharper 2.0, my custom toolbars are deleted.

This is a known problem of VS.NET 2003. You can workaround it by backuping the file where VS.NET 2003 stores information about its UI customization. The path to this file is:
"C:\Documents and Settings\<user>\Application Data\Microsoft\VisualStudio\8.0\1033\CmdUI.prf". Copy this file before installing ReSharper, and restore it from the copy after installation. This way your custom toolbars should be preserved.

You cannot uninstall ReSharper because Registrar.exe that is lauched during uninstall returns an error.