Create .NET Core platform project

BepInEx.Core/Console/ConsoleManager.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.ComponentModel;
 using System.IO;
 using System.Text;
@@ -94,7 +94,7 @@ public static class ConsoleManager
     public static TextWriter ConsoleStream => Driver?.ConsoleOut;
 
 
-    public static void Initialize(bool alreadyActive)
+    public static void Initialize(bool alreadyActive, bool useWinApiEncoder)
     {
         if (PlatformHelper.Is(Platform.Unix))
             Driver = new LinuxConsoleDriver();
@@ -104,7 +104,7 @@ public static class ConsoleManager
             throw new PlatformNotSupportedException("Was unable to determine console driver for platform " +
                                                     PlatformHelper.Current);
 
-        Driver.Initialize(alreadyActive);
+        Driver.Initialize(alreadyActive, useWinApiEncoder);
     }
 
     private static void DriverCheck()

BepInEx.Core/Console/IConsoleDriver.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 
 namespace BepInEx;
@@ -13,7 +13,7 @@ internal interface IConsoleDriver
 
     void PreventClose();
 
-    void Initialize(bool alreadyActive);
+    void Initialize(bool alreadyActive, bool useWinApiEncoder);
 
     // Apparently Windows code-pages work in Mono.
     // https://stackoverflow.com/a/33456543

BepInEx.Core/Console/Unix/LinuxConsoleDriver.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using BepInEx.Configuration;
 using BepInEx.Logging;
@@ -46,7 +46,7 @@ internal class LinuxConsoleDriver : IConsoleDriver
         // Not supported by all distros
     }
 
-    public void Initialize(bool alreadyActive)
+    public void Initialize(bool alreadyActive, bool useWinApiEncoder)
     {
         // Console is always considered active on Unix
         ConsoleActive = true;

BepInEx.Core/Console/Windows/WindowsConsoleDriver.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.IO;
 using System.Linq;
 using System.Reflection;
@@ -33,15 +33,37 @@ internal class WindowsConsoleDriver : IConsoleDriver
     private int ConsoleWidth => getWindowWidth?.Invoke() ?? 0;
     private int ConsoleHeight => getWindowHeight?.Invoke() ?? 0;
 
+    private bool useWinApiEncoder;
+
     public TextWriter StandardOut { get; private set; }
     public TextWriter ConsoleOut { get; private set; }
 
     public bool ConsoleActive { get; private set; }
     public bool ConsoleIsExternal => true;
 
-    public void Initialize(bool alreadyActive)
+    private bool TryCheckConsoleExists()
     {
-        ConsoleActive = alreadyActive || ConsoleWidth != 0 && ConsoleHeight != 0;
+        try
+        {
+            return ConsoleWidth != 0 && ConsoleHeight != 0;
+        }
+        catch (IOException)
+        {
+            //System.IO.IOException: The handle is invalid.
+            //    at System.ConsolePal.GetBufferInfo(Boolean throwOnNoConsole, Boolean & succeeded)
+            //at System.ConsolePal.get_WindowWidth()
+            //at System.Console.get_WindowWidth()
+            //at BepInEx.WindowsConsoleDriver.get_ConsoleWidth()
+            //at BepInEx.WindowsConsoleDriver.Initialize(Boolean alreadyActive)
+
+            return false;
+        }
+    }
+
+    public void Initialize(bool alreadyActive, bool useWinApiEncoder)
+    {
+        ConsoleActive = alreadyActive || TryCheckConsoleExists();
+        this.useWinApiEncoder = useWinApiEncoder;
 
         if (ConsoleActive)
         {
@@ -82,7 +104,7 @@ internal class WindowsConsoleDriver : IConsoleDriver
 
         var consoleOutStream = OpenFileStream(ConsoleWindow.ConsoleOutHandle);
         // Can't use Console.OutputEncoding because it can be null (i.e. not preference by user)
-        ConsoleOut = new StreamWriter(consoleOutStream, ConsoleEncoding.OutputEncoding)
+        ConsoleOut = new StreamWriter(consoleOutStream, useWinApiEncoder ? ConsoleEncoding.OutputEncoding : Utility.UTF8NoBom)
         {
             AutoFlush = true
         };

BepInEx.Core/Properties/AssemblyInfo.cs

@@ -1,7 +1,8 @@
-using System.Runtime.CompilerServices;
+using System.Runtime.CompilerServices;
 
 [assembly: InternalsVisibleTo("BepInEx.Preloader.Core")]
 [assembly: InternalsVisibleTo("BepInEx.Unity")]
 [assembly: InternalsVisibleTo("BepInEx.NetLauncher")]
+[assembly: InternalsVisibleTo("BepInEx.NetCore")]
 [assembly: InternalsVisibleTo("BepInEx.IL2CPP")]
 [assembly: InternalsVisibleTo("BepInExTests")]

BepInEx.IL2CPP/Preloader.cs

@@ -41,7 +41,7 @@ public static class Preloader
         {
             HarmonyBackendFix.Initialize();
 
-            ConsoleManager.Initialize(false);
+            ConsoleManager.Initialize(false, false);
 
             PreloaderLog = new PreloaderConsoleListener();
             Logger.Listeners.Add(PreloaderLog);

BepInEx.NetCore/BepInEx.NetCore.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+    <LangVersion>10</LangVersion>
+  </PropertyGroup>
+
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
+    <LangVersion>10</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\BepInEx.NetLauncher.Common\BepInEx.NetLauncher.Common.csproj" />
+    <ProjectReference Include="..\BepInEx.Preloader.Core\BepInEx.Preloader.Core.csproj" />
+  </ItemGroup>
+
+</Project>

BepInEx.NetCore/HookEntrypoint.cs

@@ -0,0 +1,202 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using BepInEx.Logging;
+using BepInEx.NetCore;
+using BepInEx.Preloader.Core;
+
+internal class StartupHook
+{
+    public static List<string> ResolveDirectories = new();
+
+    public static void Initialize()
+    {
+        try
+        {
+            string filename;
+
+//#if DEBUG
+//          filename =
+//              Path.Combine(Directory.GetCurrentDirectory(),
+//                           Path.GetFileName(Process.GetCurrentProcess().MainModule.FileName));
+//          ResolveDirectories.Add(Path.GetDirectoryName(filename));
+
+//          // for debugging within VS
+//          ResolveDirectories.Add(Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName));
+//#else
+            filename = Process.GetCurrentProcess().MainModule.FileName;
+            ResolveDirectories.Add(Path.Combine(Path.GetDirectoryName(filename), "BepInEx", "core"));
+//#endif
+
+
+            AppDomain.CurrentDomain.AssemblyResolve += RemoteResolve;
+
+            NetCorePreloaderRunner.OuterMain(filename);
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine("Unhandled exception");
+            Console.WriteLine(ex);
+        }
+    }
+
+    private static Assembly RemoteResolve(object sender, ResolveEventArgs reference)
+    {
+        var assemblyName = new AssemblyName(reference.Name);
+
+        foreach (var directory in ResolveDirectories)
+        {
+            if (!Directory.Exists(directory))
+                continue;
+
+            var potentialDirectories = new List<string> { directory };
+
+            potentialDirectories.AddRange(Directory.GetDirectories(directory, "*", SearchOption.AllDirectories));
+
+            var potentialFiles = potentialDirectories.Select(x => Path.Combine(x, $"{assemblyName.Name}.dll"))
+                                                     .Concat(potentialDirectories.Select(x =>
+                                                                 Path
+                                                                     .Combine(x,
+                                                                         $"{assemblyName.Name}.exe")));
+
+            foreach (var path in potentialFiles)
+            {
+                if (!File.Exists(path))
+                    continue;
+
+                Assembly assembly;
+
+                try
+                {
+                    assembly = Assembly.LoadFrom(path);
+                }
+                catch (Exception ex)
+                {
+                    continue;
+                }
+
+                if (assembly.GetName().Name == assemblyName.Name)
+                    return assembly;
+            }
+        }
+
+        return null;
+    }
+}
+
+namespace BepInEx.NetCore
+{
+    internal static class NetCorePreloaderRunner
+    {
+        internal static void PreloaderMain()
+        {
+            try
+            {
+                ConsoleManager.Initialize(false, false);
+
+                ConsoleManager.CreateConsole();
+
+                Logger.Listeners.Add(new ConsoleLogListener());
+
+                NetCorePreloader.Start();
+            }
+            catch (Exception ex)
+            {
+                PreloaderLogger.Log.Log(LogLevel.Fatal, "Unhandled exception");
+                PreloaderLogger.Log.Log(LogLevel.Fatal, ex);
+            }
+        }
+
+        internal static void OuterMain(string filename)
+        {
+            PlatformUtils.SetPlatform();
+
+            Paths.SetExecutablePath(filename);
+
+            AppDomain.CurrentDomain.AssemblyResolve += LocalResolve;
+
+            PreloaderMain();
+        }
+
+        private static Assembly LocalResolve(object sender, ResolveEventArgs args)
+        {
+            var assemblyName = new AssemblyName(args.Name);
+
+            var foundAssembly = AppDomain.CurrentDomain.GetAssemblies()
+                                         .FirstOrDefault(x => x.GetName().Name == assemblyName.Name);
+
+            if (foundAssembly != null)
+                return foundAssembly;
+
+            if (LocalUtility.TryResolveDllAssembly(assemblyName, Paths.BepInExAssemblyDirectory, out foundAssembly)
+             || LocalUtility.TryResolveDllAssembly(assemblyName, Paths.PatcherPluginPath, out foundAssembly)
+             || LocalUtility.TryResolveDllAssembly(assemblyName, Paths.PluginPath, out foundAssembly))
+                return foundAssembly;
+
+            return null;
+        }
+    }
+
+    /// <summary>
+    ///     Generic helper properties and methods.
+    /// </summary>
+    public static class LocalUtility
+    {
+        /// <summary>
+        ///     Try to resolve and load the given assembly DLL.
+        /// </summary>
+        /// <param name="assemblyName">Name of the assembly, of the type <see cref="AssemblyName" />.</param>
+        /// <param name="directory">Directory to search the assembly from.</param>
+        /// <param name="assembly">The loaded assembly.</param>
+        /// <returns>True, if the assembly was found and loaded. Otherwise, false.</returns>
+        private static bool TryResolveDllAssembly<T>(AssemblyName assemblyName,
+                                                     string directory,
+                                                     Func<string, T> loader,
+                                                     out T assembly) where T : class
+        {
+            assembly = null;
+
+            if (!Directory.Exists(directory))
+                return false;
+
+            var potentialDirectories = new List<string> { directory };
+
+            potentialDirectories.AddRange(Directory.GetDirectories(directory, "*", SearchOption.AllDirectories));
+
+            foreach (var subDirectory in potentialDirectories)
+            {
+                var path = Path.Combine(subDirectory, $"{assemblyName.Name}.dll");
+
+                if (!File.Exists(path))
+                    continue;
+
+                try
+                {
+                    assembly = loader(path);
+                }
+                catch (Exception)
+                {
+                    continue;
+                }
+
+                return true;
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        ///     Try to resolve and load the given assembly DLL.
+        /// </summary>
+        /// <param name="assemblyName">Name of the assembly, of the type <see cref="AssemblyName" />.</param>
+        /// <param name="directory">Directory to search the assembly from.</param>
+        /// <param name="assembly">The loaded assembly.</param>
+        /// <returns>True, if the assembly was found and loaded. Otherwise, false.</returns>
+        public static bool TryResolveDllAssembly(AssemblyName assemblyName, string directory, out Assembly assembly) =>
+            TryResolveDllAssembly(assemblyName, directory, Assembly.LoadFile, out assembly);
+    }
+
+}

BepInEx.NetCore/NetCorePreloader.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using BepInEx.Bootstrap;
+using BepInEx.Logging;
+using BepInEx.NetLauncher.Common;
+using BepInEx.Preloader.Core;
+using BepInEx.Preloader.Core.Logging;
+using BepInEx.Preloader.Core.Patching;
+using Mono.Cecil;
+
+namespace BepInEx.NetCore
+{
+    internal class NetCorePreloader
+    {
+        private static readonly ManualLogSource Log = PreloaderLogger.Log;
+
+        public static void Start()
+        {
+            var preloaderListener = new PreloaderConsoleListener();
+            Logger.Listeners.Add(preloaderListener);
+
+            var entrypointAssemblyPath = Path.ChangeExtension(Process.GetCurrentProcess().MainModule.FileName, "dll");
+
+            Paths.SetExecutablePath(entrypointAssemblyPath);
+
+            TypeLoader.SearchDirectories.Add(Path.GetDirectoryName(entrypointAssemblyPath));
+            
+            Logger.Sources.Add(TraceLogSource.CreateSource());
+
+            ChainloaderLogHelper.PrintLogInfo(Log);
+
+            Log.Log(LogLevel.Info, $"CLR runtime version: {Environment.Version}");
+
+
+            AssemblyBuildInfo executableInfo;
+
+            using (var entrypointAssembly = AssemblyDefinition.ReadAssembly(entrypointAssemblyPath))
+                executableInfo = AssemblyBuildInfo.DetermineInfo(entrypointAssembly);
+            
+            Log.LogInfo($"Game executable build architecture: {executableInfo}");
+
+            Log.Log(LogLevel.Message, "Preloader started");
+
+            using (var assemblyPatcher = new AssemblyPatcher())
+            {
+                assemblyPatcher.AddPatchersFromDirectory(Paths.PatcherPluginPath);
+
+                Log.Log(LogLevel.Info,
+                        $"{assemblyPatcher.PatcherContext.PatchDefinitions.Count} patcher definition(s) loaded");
+
+                assemblyPatcher.LoadAssemblyDirectories(new[] { Paths.GameRootPath }, new[] { "dll", "exe" });
+
+                Log.Log(LogLevel.Info, $"{assemblyPatcher.PatcherContext.AvailableAssemblies.Count} assemblies discovered");
+
+                assemblyPatcher.PatchAndLoad();
+            }
+
+            Log.LogMessage("Preloader finished");
+
+            Logger.Listeners.Remove(preloaderListener);
+
+            var chainloader = new NetChainloader();
+            chainloader.Initialize();
+            chainloader.Execute();
+        }
+    }
+}

BepInEx.NetLauncher.Common/BasePlugin.cs

@@ -0,0 +1,30 @@
+using BepInEx.Configuration;
+using BepInEx.Logging;
+using HarmonyLib;
+
+namespace BepInEx.NetLauncher.Common
+{
+    public abstract class BasePlugin
+    {
+        protected BasePlugin()
+        {
+            var metadata = MetadataHelper.GetMetadata(this);
+
+            HarmonyInstance = new Harmony("BepInEx.Plugin." + metadata.GUID);
+
+            Log = Logger.CreateLogSource(metadata.Name);
+
+            Config = new ConfigFile(Utility.CombinePaths(Paths.ConfigPath, metadata.GUID + ".cfg"), false, metadata);
+        }
+
+        public ManualLogSource Log { get; }
+
+        public ConfigFile Config { get; }
+
+        public Harmony HarmonyInstance { get; set; }
+
+        public abstract void Load();
+
+        public virtual bool Unload() => false;
+    }
+}

BepInEx.NetLauncher.Common/BepInEx.NetLauncher.Common.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFrameworks>netstandard2.1;net40</TargetFrameworks>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="HarmonyX" Version="2.8.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\BepInEx.Core\BepInEx.Core.csproj" />
+    <ProjectReference Include="..\BepInEx.Preloader.Core\BepInEx.Preloader.Core.csproj" />
+  </ItemGroup>
+
+</Project>

BepInEx.NetLauncher.Common/NetChainloader.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Reflection;
+using BepInEx.Bootstrap;
+using BepInEx.Preloader.Core.Logging;
+
+namespace BepInEx.NetLauncher.Common
+{
+    public class NetChainloader : BaseChainloader<BasePlugin>
+    {
+        public override BasePlugin LoadPlugin(PluginInfo pluginInfo, Assembly pluginAssembly)
+        {
+            var type = pluginAssembly.GetType(pluginInfo.TypeName);
+
+            var pluginInstance = (BasePlugin)Activator.CreateInstance(type);
+
+            pluginInstance.Load();
+
+            return pluginInstance;
+        }
+
+        protected override void InitializeLoggers()
+        {
+            base.InitializeLoggers();
+
+            ChainloaderLogHelper.RewritePreloaderLogs();
+        }
+    }
+}

BepInEx.NetLauncher/BasePlugin.cs

@@ -1,29 +0,0 @@
-using BepInEx.Configuration;
-using BepInEx.Logging;
-using HarmonyLib;
-
-namespace BepInEx.NetLauncher;
-
-public abstract class BasePlugin
-{
-    protected BasePlugin()
-    {
-        var metadata = MetadataHelper.GetMetadata(this);
-
-        HarmonyInstance = new Harmony("BepInEx.Plugin." + metadata.GUID);
-
-        Log = Logger.CreateLogSource(metadata.Name);
-
-        Config = new ConfigFile(Utility.CombinePaths(Paths.ConfigPath, metadata.GUID + ".cfg"), false, metadata);
-    }
-
-    public ManualLogSource Log { get; }
-
-    public ConfigFile Config { get; }
-
-    public Harmony HarmonyInstance { get; set; }
-
-    public abstract void Load();
-
-    public virtual bool Unload() => false;
-}

BepInEx.NetLauncher/BepInEx.NetLauncher.csproj

@@ -17,17 +17,18 @@
     <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
         <DebugType>portable</DebugType>
         <OutputPath>..\bin\NetLauncher\</OutputPath>
-        <DocumentationFile/>
+        <DocumentationFile />
         <PlatformTarget>x86</PlatformTarget>
         <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     </PropertyGroup>
     <ItemGroup>
-        <ProjectReference Include="..\BepInEx.Core\BepInEx.Core.csproj"/>
-        <ProjectReference Include="..\BepInEx.Preloader.Core\BepInEx.Preloader.Core.csproj" PrivateAssets="All"/>
+        <ProjectReference Include="..\BepInEx.Core\BepInEx.Core.csproj" />
+        <ProjectReference Include="..\BepInEx.NetLauncher.Common\BepInEx.NetLauncher.Common.csproj" />
+        <ProjectReference Include="..\BepInEx.Preloader.Core\BepInEx.Preloader.Core.csproj" PrivateAssets="All" />
     </ItemGroup>
     <ItemGroup>
-        <PackageReference Include="HarmonyX" Version="2.8.0"/>
-        <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" PrivateAssets="All"/>
+        <PackageReference Include="HarmonyX" Version="2.8.0" />
+        <PackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" PrivateAssets="All" />
     </ItemGroup>
-    <Import Project="..\BepInEx.Shared\BepInEx.Shared.projitems" Label="Shared"/>
+    <Import Project="..\BepInEx.Shared\BepInEx.Shared.projitems" Label="Shared" />
 </Project>

BepInEx.NetLauncher/NetChainloader.cs

@@ -1,27 +0,0 @@
-using System;
-using System.Reflection;
-using BepInEx.Bootstrap;
-using BepInEx.Preloader.Core.Logging;
-
-namespace BepInEx.NetLauncher;
-
-public class NetChainloader : BaseChainloader<BasePlugin>
-{
-    public override BasePlugin LoadPlugin(PluginInfo pluginInfo, Assembly pluginAssembly)
-    {
-        var type = pluginAssembly.GetType(pluginInfo.TypeName);
-
-        var pluginInstance = (BasePlugin) Activator.CreateInstance(type);
-
-        pluginInstance.Load();
-
-        return pluginInstance;
-    }
-
-    protected override void InitializeLoggers()
-    {
-        base.InitializeLoggers();
-
-        ChainloaderLogHelper.RewritePreloaderLogs();
-    }
-}

BepInEx.NetLauncher/NetPreloader.cs

@@ -7,6 +7,7 @@ using System.Runtime.InteropServices;
 using BepInEx.Bootstrap;
 using BepInEx.Configuration;
 using BepInEx.Logging;
+using BepInEx.NetLauncher.Common;
 using BepInEx.NetLauncher.RuntimeFixes;
 using BepInEx.Preloader.Core;
 using BepInEx.Preloader.Core.Logging;

BepInEx.NetLauncher/Program.cs

@@ -17,7 +17,7 @@ internal static class NetPreloaderRunner
         {
             Logger.Listeners.Add(new ConsoleLogListener());
 
-            ConsoleManager.Initialize(true);
+            ConsoleManager.Initialize(true, false);
 
             NetPreloader.Start(args);
         }
@@ -148,3 +148,62 @@ internal class Program
         return null;
     }
 }
+
+/// <summary>
+///     Generic helper properties and methods.
+/// </summary>
+public static class LocalUtility
+{
+    /// <summary>
+    ///     Try to resolve and load the given assembly DLL.
+    /// </summary>
+    /// <param name="assemblyName">Name of the assembly, of the type <see cref="AssemblyName" />.</param>
+    /// <param name="directory">Directory to search the assembly from.</param>
+    /// <param name="assembly">The loaded assembly.</param>
+    /// <returns>True, if the assembly was found and loaded. Otherwise, false.</returns>
+    private static bool TryResolveDllAssembly<T>(AssemblyName assemblyName,
+                                                 string directory,
+                                                 Func<string, T> loader,
+                                                 out T assembly) where T : class
+    {
+        assembly = null;
+
+        if (!Directory.Exists(directory))
+            return false;
+
+        var potentialDirectories = new List<string> { directory };
+
+        potentialDirectories.AddRange(Directory.GetDirectories(directory, "*", SearchOption.AllDirectories));
+
+        foreach (var subDirectory in potentialDirectories)
+        {
+            var path = Path.Combine(subDirectory, $"{assemblyName.Name}.dll");
+
+            if (!File.Exists(path))
+                continue;
+
+            try
+            {
+                assembly = loader(path);
+            }
+            catch (Exception)
+            {
+                continue;
+            }
+
+            return true;
+        }
+
+        return false;
+    }
+
+    /// <summary>
+    ///     Try to resolve and load the given assembly DLL.
+    /// </summary>
+    /// <param name="assemblyName">Name of the assembly, of the type <see cref="AssemblyName" />.</param>
+    /// <param name="directory">Directory to search the assembly from.</param>
+    /// <param name="assembly">The loaded assembly.</param>
+    /// <returns>True, if the assembly was found and loaded. Otherwise, false.</returns>
+    public static bool TryResolveDllAssembly(AssemblyName assemblyName, string directory, out Assembly assembly) =>
+        TryResolveDllAssembly(assemblyName, directory, Assembly.LoadFile, out assembly);
+}

BepInEx.NetLauncher/Utility.cs

@@ -1,65 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Reflection;
-
-namespace BepInEx.NetLauncher;
-
-/// <summary>
-///     Generic helper properties and methods.
-/// </summary>
-public static class LocalUtility
-{
-    /// <summary>
-    ///     Try to resolve and load the given assembly DLL.
-    /// </summary>
-    /// <param name="assemblyName">Name of the assembly, of the type <see cref="AssemblyName" />.</param>
-    /// <param name="directory">Directory to search the assembly from.</param>
-    /// <param name="assembly">The loaded assembly.</param>
-    /// <returns>True, if the assembly was found and loaded. Otherwise, false.</returns>
-    private static bool TryResolveDllAssembly<T>(AssemblyName assemblyName,
-                                                 string directory,
-                                                 Func<string, T> loader,
-                                                 out T assembly) where T : class
-    {
-        assembly = null;
-
-        if (!Directory.Exists(directory))
-            return false;
-
-        var potentialDirectories = new List<string> { directory };
-
-        potentialDirectories.AddRange(Directory.GetDirectories(directory, "*", SearchOption.AllDirectories));
-
-        foreach (var subDirectory in potentialDirectories)
-        {
-            var path = Path.Combine(subDirectory, $"{assemblyName.Name}.dll");
-
-            if (!File.Exists(path))
-                continue;
-
-            try
-            {
-                assembly = loader(path);
-            }
-            catch (Exception)
-            {
-                continue;
-            }
-
-            return true;
-        }
-
-        return false;
-    }
-
-    /// <summary>
-    ///     Try to resolve and load the given assembly DLL.
-    /// </summary>
-    /// <param name="assemblyName">Name of the assembly, of the type <see cref="AssemblyName" />.</param>
-    /// <param name="directory">Directory to search the assembly from.</param>
-    /// <param name="assembly">The loaded assembly.</param>
-    /// <returns>True, if the assembly was found and loaded. Otherwise, false.</returns>
-    public static bool TryResolveDllAssembly(AssemblyName assemblyName, string directory, out Assembly assembly) =>
-        TryResolveDllAssembly(assemblyName, directory, Assembly.LoadFile, out assembly);
-}

BepInEx.Preloader.Core/AssemblyBuildInfo.cs

@@ -6,43 +6,66 @@ namespace BepInEx.Preloader.Core
 {
     public class AssemblyBuildInfo
     {
+        public enum FrameworkType
+        {
+            Unknown,
+            NetFramework,
+            NetStandard,
+            NetCore
+        }
+
         public Version NetFrameworkVersion { get; private set; }
 
         public bool IsAnyCpu { get; set; }
 
         public bool Is64Bit { get; set; }
 
-        private static Version GetNet4Version(AssemblyDefinition assemblyDefinition)
+        public FrameworkType AssemblyFrameworkType { get; set; }
+
+        private void SetNet4Version(AssemblyDefinition assemblyDefinition)
         {
+            NetFrameworkVersion = new Version(0, 0);
+            AssemblyFrameworkType = FrameworkType.Unknown;
+
             var targetFrameworkAttribute = assemblyDefinition.CustomAttributes.FirstOrDefault(x => 
                 x.AttributeType.FullName == "System.Runtime.Versioning.TargetFrameworkAttribute");
 
             if (targetFrameworkAttribute == null)
-                return null;
+                return;
 
             if (targetFrameworkAttribute.ConstructorArguments.Count < 1)
-                return null;
+                return;
 
             if (targetFrameworkAttribute.ConstructorArguments[0].Type.Name != "String")
-                return null;
+                return;
 
             string versionInfo = (string)targetFrameworkAttribute.ConstructorArguments[0].Value;
 
             var values = versionInfo.Split(',');
 
+            
+
             foreach (var value in values)
             {
-                if (!value.StartsWith("Version=v"))
-                    continue;
-
-                try
+                if (value.StartsWith(".NET"))
                 {
-                    return new Version(value.Substring("Version=v".Length));
+                    AssemblyFrameworkType = value switch
+                    {
+                        ".NETFramework" => FrameworkType.NetFramework,
+                        ".NETCoreApp"   => FrameworkType.NetCore,
+                        ".NETStandard"  => FrameworkType.NetStandard,
+                        _               => FrameworkType.Unknown
+                    };
+                }
+                else if (value.StartsWith("Version=v"))
+                {
+                    try
+                    {
+                        NetFrameworkVersion = new Version(value.Substring("Version=v".Length));
+                    }
+                    catch { }
                 }
-                catch {}
             }
-
-            return null;
         }
 
         public static AssemblyBuildInfo DetermineInfo(AssemblyDefinition assemblyDefinition)
@@ -56,20 +79,23 @@ namespace BepInEx.Preloader.Core
             if (runtime == TargetRuntime.Net_1_0)
             {
                 buildInfo.NetFrameworkVersion = new Version(1, 0);
+                buildInfo.AssemblyFrameworkType = FrameworkType.NetFramework;
             }
             else if (runtime == TargetRuntime.Net_1_1)
             {
                 buildInfo.NetFrameworkVersion = new Version(1, 1);
+                buildInfo.AssemblyFrameworkType = FrameworkType.NetFramework;
             }
             else if (runtime == TargetRuntime.Net_2_0)
             {
                 // Assume 3.5 here. The code to determine versions between 2.0 and 3.5 is not worth the amount of non-unity games that use it, if any
 
                 buildInfo.NetFrameworkVersion = new Version(3, 5);
+                buildInfo.AssemblyFrameworkType = FrameworkType.NetFramework;
             }
             else
             {
-                buildInfo.NetFrameworkVersion = GetNet4Version(assemblyDefinition) ?? new Version(4, 0);
+                buildInfo.SetNet4Version(assemblyDefinition);
             }
 
             // bitness
@@ -131,12 +157,20 @@ namespace BepInEx.Preloader.Core
         /// <inheritdoc />
         public override string ToString()
         {
+            string frameworkType = AssemblyFrameworkType switch {
+                FrameworkType.NetFramework => "Framework",
+                FrameworkType.NetStandard  => "Standard",
+                FrameworkType.NetCore      => "Core",
+                FrameworkType.Unknown      => "Unknown",
+                _                          => throw new ArgumentOutOfRangeException()
+            };
+
             if (IsAnyCpu)
             {
-                return $".NET Framework {NetFrameworkVersion}, AnyCPU ({(Is64Bit ? "64" : "32")}-bit preferred)";
+                return $".NET {frameworkType} {NetFrameworkVersion}, AnyCPU ({(Is64Bit ? "64" : "32")}-bit preferred)";
             }
 
-            return $".NET Framework {NetFrameworkVersion}, {(Is64Bit ? "x64" : "x86")}";
+            return $".NET {frameworkType} {NetFrameworkVersion}, {(Is64Bit ? "x64" : "x86")}";
         }
     }
 }

BepInEx.Preloader.Core/Properties/AssemblyInfo.cs

@@ -1,5 +1,6 @@
-using System.Runtime.CompilerServices;
+using System.Runtime.CompilerServices;
 
 [assembly: InternalsVisibleTo("BepInEx.Preloader.Unity")]
 [assembly: InternalsVisibleTo("BepInEx.NetLauncher")]
+[assembly: InternalsVisibleTo("BepInEx.NetCore")]
 [assembly: InternalsVisibleTo("BepInEx.IL2CPP")]

BepInEx.Preloader.Unity/UnityPreloader.cs

@@ -43,7 +43,7 @@ internal static class UnityPreloader
         {
             HarmonyBackendFix.Initialize();
 
-            ConsoleManager.Initialize(false);
+            ConsoleManager.Initialize(false, true);
             AllocateConsole();
 
             Utility.TryDo(() =>

BepInEx.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.28922.388
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32112.339
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BepInExTests", "BepInExTests\BepInExTests.csproj", "{E7CD429A-D057-48E3-8C51-E5C934E8E07B}"
 	ProjectSection(ProjectDependencies) = postProject
@@ -26,23 +26,25 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "IL2CPP", "IL2CPP", "{D5F47C
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BepInEx.IL2CPP", "BepInEx.IL2CPP\BepInEx.IL2CPP.csproj", "{429D5F83-7FEC-4D09-AB82-E868EB61AF59}"
 EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Assets", "Assets", "{68C57430-3E92-4B50-A9A5-208FE9CCD914}"
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Markdown", "Markdown", "{68C57430-3E92-4B50-A9A5-208FE9CCD914}"
 	ProjectSection(SolutionItems) = preProject
 		README.md = README.md
-		build.cake = build.cake
 	EndProjectSection
 EndProject
 Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "BepInEx.Shared", "BepInEx.Shared\BepInEx.Shared.shproj", "{5C7847FB-C16D-47BD-BB17-1045669F9AA7}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BepInEx.NetLauncher.Common", "BepInEx.NetLauncher.Common\BepInEx.NetLauncher.Common.csproj", "{76EB1952-7826-471C-9CF3-815D094DA077}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BepInEx.NetCore", "BepInEx.NetCore\BepInEx.NetCore.csproj", "{08083F40-98AA-4176-BA01-817C18C35C7F}"
+EndProject
 Global
 	GlobalSection(SharedMSBuildProjectFiles) = preSolution
+		BepInEx.Shared\BepInEx.Shared.projitems*{15f8bc38-a761-4f93-8903-1b531ac5d9f9}*SharedItemsImports = 5
 		BepInEx.Shared\BepInEx.Shared.projitems*{429d5f83-7fec-4d09-ab82-e868eb61af59}*SharedItemsImports = 5
 		BepInEx.Shared\BepInEx.Shared.projitems*{490b052b-7f23-4052-ad04-613856618901}*SharedItemsImports = 5
 		BepInEx.Shared\BepInEx.Shared.projitems*{4ffba620-f5ed-47f9-b90c-dad1316fd9b9}*SharedItemsImports = 5
 		BepInEx.Shared\BepInEx.Shared.projitems*{5c7847fb-c16d-47bd-bb17-1045669f9aa7}*SharedItemsImports = 13
-		BepInEx.Shared\BepInEx.Shared.projitems*{6e6bc1e5-5be8-4566-b3ae-52c4cb218aeb}*SharedItemsImports = 5
 		BepInEx.Shared\BepInEx.Shared.projitems*{d404c973-441d-48ed-b266-c21320ba0d87}*SharedItemsImports = 5
-		BepInEx.Shared\BepInEx.Shared.projitems*{dc89f18b-235b-4c01-ab31-af40dce5c4c7}*SharedItemsImports = 5
 		BepInEx.Shared\BepInEx.Shared.projitems*{eae9fae6-8011-45a3-8b6e-0c7f14210533}*SharedItemsImports = 5
 	EndGlobalSection
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -102,6 +104,22 @@ Global
 		{429D5F83-7FEC-4D09-AB82-E868EB61AF59}.Release_Unity|Any CPU.Build.0 = Release|Any CPU
 		{429D5F83-7FEC-4D09-AB82-E868EB61AF59}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{429D5F83-7FEC-4D09-AB82-E868EB61AF59}.Release|Any CPU.Build.0 = Release|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Release_NetFramework|Any CPU.ActiveCfg = Release|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Release_NetFramework|Any CPU.Build.0 = Release|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Release_Unity|Any CPU.ActiveCfg = Release|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Release_Unity|Any CPU.Build.0 = Release|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{76EB1952-7826-471C-9CF3-815D094DA077}.Release|Any CPU.Build.0 = Release|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Release_NetFramework|Any CPU.ActiveCfg = Release|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Release_NetFramework|Any CPU.Build.0 = Release|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Release_Unity|Any CPU.ActiveCfg = Release|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Release_Unity|Any CPU.Build.0 = Release|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{08083F40-98AA-4176-BA01-817C18C35C7F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -111,6 +129,8 @@ Global
 		{D404C973-441D-48ED-B266-C21320BA0D87} = {6E2DD21E-0854-4F4A-B925-D90E0016D03D}
 		{490B052B-7F23-4052-AD04-613856618901} = {6EC98884-A3DC-4828-85EF-5F10F7519429}
 		{429D5F83-7FEC-4D09-AB82-E868EB61AF59} = {D5F47CFC-E4F3-46EE-B4F3-2474CF7D9E2C}
+		{76EB1952-7826-471C-9CF3-815D094DA077} = {6EC98884-A3DC-4828-85EF-5F10F7519429}
+		{08083F40-98AA-4176-BA01-817C18C35C7F} = {6EC98884-A3DC-4828-85EF-5F10F7519429}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {55AC11EF-F568-4C79-A356-7ED9510145B1}