从网上找到一个vs2015的项目，升级到vs2019编译，报错说找不到mscore.lib，在系统里找了一圈，发现确实没有这个文件。上网一搜，几乎都没哪个能清楚说明这个文件到底在哪里。
正确答案：
在.NET framework 的SDK里面，如下图所示，是在.NET Framework 4.6.1 SDK中，不是那个.NET Framework 4.6目标包。实际 上，应该是任何一个framework的SDK包都可以。我试了一下，安装完后立刻就可以编译了。
如果不想安装SDK，就下载这个到项目里直接编译就好了，如下
https://download.csdn.net/download/tanmx219/12745012
下面是网上给出的一个参考，这里还设置了环境变量（一般不需要，SDK会自己设置这些参数）
[vc141] LNK1104: cannot open file 'MSCOREE.lib
Summary
Cannot build C++/CLI project. Linker returns
LINK : fatal error LNK1104: cannot open file 'MSCOREE.lib'
Investigation
MSCOREE.lib on my laptop is located in “C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\Lib\um\x64” folder.
In the “Configuration Properties -> VC++ Directories” the value of “Library Directories” is
$(VC_LibraryPath_x64)
$(WindowsSDK_LibraryPath_x64)
$(NETFXKitsDir)Lib\um\x64
Which is after parameters are applied equals to
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.16.27023\lib\x64
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Tools\MSVC\14.16.27023\atlmfc\lib\x64
C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\VC\Auxiliary\VS\lib\x64
C:\Program Files (x86)\Windows Kits\10\lib\10.0.16299.0\ucrt\x64
C:\Program Files (x86)\Windows Kits\10\lib\10.0.16299.0\um\x64
lib\um\x64
Lib\um\x64
See last two lines at bottom. Those are values of $(NETFXKitsDir)Lib\um\x64.
So, for some reason for the toolset “vc141” the value of NETFXKitsDir is not defined. If I create NETFXKitsDir environment variable equal to C:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\, then I can build the project.
Environment:
- Visual Studio 2019
- Toolset: vc141
- Project’s Target Framework Version: 4.7.2
Installed packages
- NET Framework 4-4.6 development tools
- NET Framework 4.6.1 development tools
- NET Framework 4.8 development tools
- C++/CLI support for v142 build tools
- C++/CLI support for v141 build tools
- MSVC v141 - VS 2017 C++ x64/x86 build tools (v14.16)