C#动态加载程序集的全攻略

Assembly assembly = Assembly.Load("MyAssembly");

Assembly assembly = Assembly.LoadFrom("C:\\MyAssembly.dll");

Assembly assembly = Assembly.LoadFile("C:\\MyAssembly.dll");

string path = @"C:\MyAssembly.dll";
Assembly assembly = Assembly.LoadFile(path);

// 获取类型（需指定命名空间和类名）
Type type = assembly.GetType("MyNamespace.MyClass");

// 创建实例（无参构造函数）
object instance = Activator.CreateInstance(type);

// 获取方法信息
MethodInfo method = type.GetMethod("MyMethod");

// 调用方法（无参）
method.Invoke(instance, null);

AppDomain.CurrentDomain.AssemblyResolve += (sender, args) =>
{
    string dependencyPath = @"C:\MyDependency.dll";
    return File.Exists(dependencyPath) ? Assembly.LoadFile(dependencyPath) : null;
};

// 加载插件
Assembly pluginAssembly = Assembly.LoadFrom("Plugin.dll");

// 查找所有实现 IPlugin 接口的类型
foreach (Type type in pluginAssembly.GetTypes())
{
    if (typeof(IPlugin).IsAssignableFrom(type) && !type.IsInterface)
    {
        IPlugin plugin = (IPlugin)Activator.CreateInstance(type);
        plugin.Execute();
    }
}

string moduleName = "ModuleA";
Assembly moduleAssembly = Assembly.Load(moduleName);
Type moduleType = moduleAssembly.GetType($"{moduleName}.ModuleClass");
object moduleInstance = Activator.CreateInstance(moduleType);

Assembly resourceAssembly = Assembly.Load("Resources");
ResourceManager rm = new ResourceManager("MyResources", resourceAssembly);
string localizedText = rm.GetString("WelcomeMessage");

// 创建新 AppDomain 并加载程序集
AppDomain domain = AppDomain.CreateDomain("PluginDomain");
domain.Load("MyAssembly");

// 卸载 AppDomain 以释放程序集
AppDomain.Unload(domain);

using System;
using System.IO;
using System.Reflection;

class Program
{
    static void Main()
    {
        // 注册依赖项加载事件
        AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;

        // 动态加载主程序集
        string mainDllPath = @"C:\MainAssembly.dll";
        Assembly mainAssembly = Assembly.LoadFile(mainDllPath);

        // 获取类型并创建实例
        Type mainType = mainAssembly.GetType("MainNamespace.MainClass");
        object mainInstance = Activator.CreateInstance(mainType);

        // 调用方法
        MethodInfo method = mainType.GetMethod("Run");
        method.Invoke(mainInstance, null);
    }

    private static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
    {
        // 手动加载依赖项
        string dependencyPath = Path.Combine(@"C:\Dependencies", new AssemblyName(args.Name).Name + ".dll");
        return File.Exists(dependencyPath) ? Assembly.LoadFile(dependencyPath) : null;
    }
}