Steps to reproduce:

1. Install 0.9.1 vNext x64 on Windows 11
2. Open NetPad and press F4 to open the script properties
3. On the References tab, click the "Browse" button at the bottom-left of the dialog
4. Navigate to the .NET assembly / dll you want to reference, select it and click the "Open" button

Behavior:

No reference is added to the script properties. Additionally, if you save NetPad script to a file and open it in a text editor, the "references" array in the json blob is empty.

Expected Behavior:

A reference should be added to the properties of the script OR an error message should be displayed describing why the operation failed.

Other notes:

Nuget package references seem to work without issue and the appropriate object is added to the "references" array in the json blob.