Purge Unused with the Revit API (Part 1)

In this entry, I will explain how to replicate the Purge Unused command using the Revit API. In the first part, I will explain how to delete all the unused families with the PerformanceAdviser.

Using this class, you cannot purge materials and material assets, so in Part 2, I will show you how to clean them.

 

You can find the Part 1 code below, along with comments explaining each part. Feel free to leave any questions or suggestions in the comments.