Using an API with C# no errors but no results either. Help….

I’m Following this guide and I have got all errors removed but the button is still not showing. The following is my code (No errors in visual studio, builds error free): using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Autodesk.Revit.UI; using Autodesk.Revit.DB; using System.Windows.Media.Imaging; using System.Reflection; namespace Walkthrough { /// /// This […]