Directory.Build.props

<Project>
    <PropertyGroup>
        <ReplacePackageReferences>true</ReplacePackageReferences>
    </PropertyGroup>

    <Choose>
        <When Condition="$(ReplacePackageReferences) AND '$(SolutionPath)' != '' AND '$(SolutionPath)' != '*undefined*' AND Exists('$(SolutionPath)')">

            <PropertyGroup>
                <SolutionFileContent>$([System.IO.File]::ReadAllText($(SolutionPath)))</SolutionFileContent>
                <SmartSolutionDir>$([System.IO.Path]::GetDirectoryName( $(SolutionPath) ))</SmartSolutionDir>
                <RegexPattern>(?&lt;="[PackageName]", ")(.*)(?=", ")</RegexPattern>
            </PropertyGroup>

            <ItemGroup>

                <!-- Keep the identity of the  packagereference -->
                <SmartPackageReference Include="@(PackageReference)">
                    <PackageName>%(Identity)</PackageName>
                    <InSolution>$(SolutionFileContent.Contains('\%(Identity).csproj'))</InSolution>
                </SmartPackageReference>

                <!-- Filter them by mapping them to another itemGroup using the WithMetadataValue item function -->
                <PackageInSolution Include="@(SmartPackageReference -> WithMetadataValue('InSolution', True) )">
                    <Pattern>$(RegexPattern.Replace('[PackageName]','%(PackageName)') )</Pattern>
                    <SmartPath>$([System.Text.RegularExpressions.Regex]::Match( '$(SolutionFileContent)', '%(Pattern)' ))</SmartPath>
                </PackageInSolution>

                <ProjectReference  Include="@(PackageInSolution -> '$(SmartSolutionDir)\%(SmartPath)' )"/>

                <!-- Remove the package references that are now referenced as projects -->
                <PackageReference Remove="@(PackageInSolution -> '%(PackageName)' )"/>
            </ItemGroup>

        </When>
    </Choose>
</Project>