This assembly is in the GAC: Microsoft.SqlServer.Management.RegisteredServers.dll
How can I add a reference to this assembly in Visual Studio?
I can view the
Assuming you alredy tried to "Add Reference..." as explained above and did not succeed, you can have a look here. They say you have to meet some prerequisites: - .NET 3.5 SP1 - Windows Installer 4.5
EDIT: According to this post it is a known issue.
And this could be the solution you're looking for :)