Is there a way to determine if there is an open solution in VS 2012 from a vsix extension?

Question

I would like to disable parts of the window of my extension tool if it is open without a loaded solution and I need a way to detect this.

I know about the DTE events that are triggered when the solution opens / closes, is it possible for such an event when the IDE itself has finished loading?

Answer 1

I found my answer when I wrote the question, but I thought that I could probably imagine if someone else is looking for this in the future with similar search terms for me.

EnvDTE.Solution.IsOpen