If you get the following prompt while trying to Browse properties of your Database in SQL Server management studio, its time for an update.
“Cannot show requested dialog”
“Method not found: ‘System.Collections.Specialized.StringCollection”
Next step would be to click on Tools-> check for Updates and you would most likely have an update waiting to be installed.
Click on Update in the above screen to be redirected to the link to download latest version of SQL Server Management Studio. (17.6 at the time of this writing).
Once the update is completed you would need to restart the machine.