Unity Hotfix工程引用的dll使用相对路径，这样可以不用再手动引用Unity安装目录的dll

Unity/Hotfix/Unity.Hotfix.csproj

@@ -39,16 +39,16 @@
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="UnityEngine, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null">
-      <HintPath>C:\Apps\Unity\Editor\Data\Managed\UnityEngine\UnityEngine.dll</HintPath>
+      <HintPath>..\Temp\UnityVS_bin\Debug\UnityEngine.dll</HintPath>
     </Reference>
     <Reference Include="UnityEngine.CoreModule, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null">
-      <HintPath>C:\Apps\Unity\Editor\Data\Managed\UnityEngine\UnityEngine.CoreModule.dll</HintPath>
+      <HintPath>..\Temp\UnityVS_bin\Debug\UnityEngine.CoreModule.dll</HintPath>
     </Reference>
     <Reference Include="UnityEngine.PhysicsModule, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null">
-      <HintPath>C:\Apps\Unity\Editor\Data\Managed\UnityEngine\UnityEngine.PhysicsModule.dll</HintPath>
+      <HintPath>..\Temp\UnityVS_bin\Debug\UnityEngine.PhysicsModule.dll</HintPath>
     </Reference>
     <Reference Include="UnityEngine.UI, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null">
-      <HintPath>C:\Apps\Unity\Editor\Data\UnityExtensions\Unity\GUISystem\UnityEngine.UI.dll</HintPath>
+      <HintPath>..\Temp\UnityVS_bin\Debug\UnityEngine.UI.dll</HintPath>
     </Reference>
   </ItemGroup>
   <ItemGroup>