C#中T4模板中获取当前项目或解决方案路径

<#@ template debug="false" hostspecific="true" language="C#" #>
<#
    string solutionsPath = Host.ResolveAssemblyReference("$(SolutionDir)");//获取解决方案路径
    string projectPath = Host.ResolveAssemblyReference("$(ProjectDir)");//获取当前项目路径
#>
<#=solutionsPath#>
<#=projectPath#>