Extreme wait-time when taking a SQL Server database offline

Question

I\'m trying to perform some offline maintenance (dev database restore from live backup) on my dev database, but the \'Take Offline\' command via SQL Server Management Studio is

Answer 1

In my case, after waiting so much for it to finish I had no patience and simply closed management studio. Before exiting, it showed the success message, db is offline. The files were available to rename.