/usr/lib/mono/xbuild-frameworks/.NETFramework/v4.5/RedistList/FrameworkList.xml is in mono-xbuild 3.2.8+dfsg-4ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | <?xml version="1.0" encoding="utf-8"?>
<FileList Name=".NET Framework 4.5" TargetFrameworkDirectory="..\..\..\..\4.5">
</FileList>
|