Fix project files

BepInEx/BepInEx.csproj

@@ -49,6 +49,7 @@
     </Reference>
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="Attributes.cs" />
     <Compile Include="Config.cs" />
     <Compile Include="ConfigWrapper.cs" />
     <Compile Include="ConsoleUtil\ConsoleEncoding\ConsoleEncoding.Buffers.cs" />
@@ -62,6 +63,7 @@
     <Compile Include="BaseUnityPlugin.cs" />
     <Compile Include="Logger.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="TypeLoader.cs" />
   </ItemGroup>
   <Import Project="..\BepInEx.Common\BepInEx.Common.projitems" Label="Shared" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />