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我正在尝试ItemGroup使用目录基本名称填充一个，通过转换将其传递以从它们创建绝对路径并导入驻留在那里的文件。它在Message元素中完美运行，但在Import. 我错过了什么？

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <ItemGroup>
        <MyDependencies Include="Dir1" />
        <MyDependencies Include="Dir2" />
    </ItemGroup>

    <!-- "Expansion: C:\path\Dir1\import.targets;C:\some\path\Dir2\import.targets" -->
    <Target Name="TestMessage" BeforeTargets="PrepareForBuild">
        <Message
            Importance="High"
            Text="Expansion: @(MyDependencies -> 'C:\path\%(Identity)\import.targets')"
        />
    </Target>

<!-- Uncomment to trigger error -->
<!--<Import Project="@(MyDependencies -> 'C:\path\%(Identity)\import.targets')" />-->
</Project>

的Import路径保持未扩展并导致：

error MSB4102: The value "@(MyDependencies -> 'C:\path\%(Identity)\import.targets')" of the "Project" attribute in element <Import> is invalid. Illegal characters in path.
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