1. Create a new Console application
2. Create a new folder called "Exclude", copy Program.cs into it
3. Unload -> Edit
4. Replace the <Compile Include items with <Compile Include="**/*.cs" Exclude="Excluded/**" />
5. Reload project

Expected: For Excluded\Program.cs to not be included in the project
Actual: Excluded\Program.cs is included in the project.

It appears that while '/' is understood in Include, it's not in Exclude. Does this prevent us from writing platform-agnostic paths?