README.md

common usage library props.

• Platform can have any value. It is user-defined.
• PlatformTarget must have a valid value of AnyCPU, x86, x64, ARM, ...

https://docs.microsoft.com/en-us/visualstudio/msbuild/msbuild-target-framework-and-target-platform?view=vs-2019

尽量用PlatformTarget