你好，
VS的UI里面好像是没有环境变量，不过MSBuild支持环境变量，请看一下下面的内容是否符合你的场景。https://msdn.microsoft.com/zh-cn/library/ms171459(v=vs.90).aspx
VC和C#工程的编译引擎是不一样的，所以两者没有可比性。
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