<!--
Workaround MSBuild issue that prevents System.Runtime 2.5 and System.Threading.Tasks 2.5 from
satisfying indirect dependencies on System.Runtime 1.5 and System.Threading.Tasks 1.5 respectively.
-->
<AutoUnifyAssemblyReferences>false</AutoUnifyAssemblyReferences>
"AutoUnifyAssemblyReferences" 究竟是什么作用?