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;
    }
}