Add shared project with shared version info

BepInEx.Shared/AssemblyInfo.cs

@@ -0,0 +1,11 @@
+using System.Reflection;
+
+[assembly:AssemblyCopyright("Copyright © 2020 BepInEx Team")]
+[assembly: AssemblyVersion(VersionInfo.VERSION)]
+[assembly: AssemblyFileVersion(VersionInfo.VERSION)]
+[assembly: AssemblyInformationalVersion(VersionInfo.VERSION)]
+
+internal static class VersionInfo
+{
+	public const string VERSION = "6.0.0.0";
+}

BepInEx.Shared/BepInEx.Shared.projitems

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>E312EFD4-47ED-4DCE-B279-6B0EE314989F</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>BepInEx.Shared</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)AssemblyInfo.cs" />
+  </ItemGroup>
+</Project>

BepInEx.Shared/BepInEx.Shared.shproj

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <PropertyGroup Label="Globals">
+        <ProjectGuid>{5C7847FB-C16D-47BD-BB17-1045669F9AA7}</ProjectGuid>
+    </PropertyGroup>
+    <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+    <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+    <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+    <Import Project="BepInEx.Shared.projitems" Label="Shared" />
+    <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>