Hi there,
I am glad you like Wix#.
The problem is a defect/enhancement so can you please log it a an Issue on https://github.com/oleg-shilo/wixsharp? CodePlex is no longer active and I only discovered your post by a chance.
In a mean time (until the fix is available) you can use VS project WixSharp Custom UI template and adjust the treeview directly from the dialog code.
Thank you,
Oleg
I am glad you like Wix#.
The problem is a defect/enhancement so can you please log it a an Issue on https://github.com/oleg-shilo/wixsharp? CodePlex is no longer active and I only discovered your post by a chance.
In a mean time (until the fix is available) you can use VS project WixSharp Custom UI template and adjust the treeview directly from the dialog code.
Thank you,
Oleg