Copy entire directory to output folder maintaining the folder structure?

I just added this to my *.csproj file (right click Edit Project File)

<ItemGroup>
    <Content Include="MYCUSTOMFOLDER\**">
        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </Content>
</ItemGroup>

I think for this the directory needs to be on same hierarchy level as *.csproj file or bellow that.