Prepare to remove my old Plugin Loader

Author: LoneWandererProductions

CoreLibrary.sln

@@ -77,12 +77,7 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "CommonExtendedObjectsTests"
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Projektmappenelemente", "Projektmappenelemente", "{84D27F74-D2BA-6C25-2661-968F101900D9}"
 	ProjectSection(SolutionItems) = preProject
-		.gitattributes = .gitattributes
-		.gitignore = .gitignore
 		.github\workflows\dotnet.yml = .github\workflows\dotnet.yml
-		License.txt = License.txt
-		README.md = README.md
-		Todo.txt = Todo.txt
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CoreViewer", "CoreViewer\CoreViewer.csproj", "{B17F7012-EB24-4A3A-9A97-9779E5116D66}"
@@ -97,6 +92,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CommonControls.Images", "Co
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CommonControls.Converter", "CommonControls.Converter\CommonControls.Converter.csproj", "{A2C8D860-41F8-40B8-B939-BCA253AC2729}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Loader", "..\PluginArchitecture\Loader\Loader.csproj", "{9C0DCDDA-04F4-1201-B0C6-AF41EE961062}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -255,6 +252,10 @@ Global
 		{A2C8D860-41F8-40B8-B939-BCA253AC2729}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A2C8D860-41F8-40B8-B939-BCA253AC2729}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A2C8D860-41F8-40B8-B939-BCA253AC2729}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9C0DCDDA-04F4-1201-B0C6-AF41EE961062}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9C0DCDDA-04F4-1201-B0C6-AF41EE961062}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9C0DCDDA-04F4-1201-B0C6-AF41EE961062}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9C0DCDDA-04F4-1201-B0C6-AF41EE961062}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Loader/Loader.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

Loader/PluginLoading.cs

@@ -0,0 +1,52 @@
+/*
+ * COPYRIGHT:   See COPYING in the top level directory
+ * PROJECT:     Loader
+ * FILE:        PluginLoading.cs
+ * PURPOSE:     Generic plugin loader that loads implementations of a given contract.
+ * PROGRAMMER:  Peter Geinitz (Wayfarer)
+ */
+
+using System.Reflection;
+
+namespace Loader
+{
+    /// <summary>
+    /// Generic plugin loader that loads implementations of a given contract.
+    /// </summary>
+    public sealed class PluginLoading
+    {
+        /// <summary>
+        /// Loads all implementations of <typeparamref name="TContract"/> from the specified directory.
+        /// </summary>
+        /// <typeparam name="TContract">The contract interface or base class.</typeparam>
+        /// <param name="directory">Directory containing plugin assemblies.</param>
+        /// <returns>Loaded plugin instances.</returns>
+        public IReadOnlyList<TContract> Load<TContract>(string directory)
+            where TContract : class
+        {
+            if (directory == null)
+                throw new ArgumentNullException(nameof(directory));
+
+            var result = new List<TContract>();
+
+            foreach (var file in Directory.EnumerateFiles(directory, "*.dll"))
+            {
+                var asm = Assembly.LoadFrom(file);
+
+                foreach (var type in asm.GetTypes())
+                {
+                    if (type.IsAbstract || type.IsInterface)
+                        continue;
+
+                    if (!typeof(TContract).IsAssignableFrom(type))
+                        continue;
+
+                    if (Activator.CreateInstance(type) is TContract instance)
+                        result.Add(instance);
+                }
+            }
+
+            return result;
+        }
+    }
+}