Problem
Create projet
Double click to window1, for open the tab "Window1"
Select "Code" tab
You see at the left "Members"
right click inside
You have only "Paste" item menu
Missing "Add to ->" Menu with subItem "Computed Property,Method...."
New create a method
select "Methods" like screenshoot
use right click only "Paste" , missing "Add Method"
same problem for properties...

Proposed Solution
Example Workflow
Alternatives Considered
Who Would This Help?