C# solution template: import existing projects

Hello,

Is it possible to import existing projects (.csproj) in a C# solution template (xpt files)?

I tried something like this but it doesn't work:

<Template ...>

    <TemplateConfiguration>    ...   </TemplateConfiguration>

    <Solution name = "${ProjectName}" directory = ".">

        <SolutionFolder name = "Libraries">            In this directory I want to open existing projects that will be linked

            <ProjectItems>                                          Method 1: doesn't work

                <ProjectReference Include="..\..\software\MyLibrary.csproj">

                    <Project>{02C7DDC6-EB5B-442A-B170-7C8C1A958E62}</Project>

                    <Name>MyLibrary</Name>

                </ProjectReference>

            </ProjectItems>

            <Imports>                                                  Method 2: doesn't work either

                 <Import Project="..\..\software\MyLibrary.csproj" />

            </Imports>

        </SolutionFolder>
       
       
        <Project name = "Wizard${ProjectName}" language = "C#">

            <ProjectItems>
               
                <ProjectReference Include="..\..\software\MyLibrary.csproj">             The library is linked here (works!)

                    <Project>{02C7DDC6-EB5B-442A-B170-7C8C1A958E62}</Project>

                    <Name>MyLibrary</Name>

                </ProjectReference>

            </ProjectItems>
            
            <PropertyGroup>    ...     </PropertyGroup>
            
            <Files>   ...  </Files>

        </Project>

    </Solution>

</Template>

Could you please advice?

Thanks in advance,

Davy