在运行时动态生成DLL程序集

using System;
using System.Reflection;
using System.Reflection.Emit;

class Program
{
    static void Main()
    {
        // 定义程序集名称和版本
        var assemblyName = new AssemblyName("DynamicAssemblyExample");
        assemblyName.Version = new Version(1, 0, 0, 0);

        // 创建动态程序集
        var assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Save);

        // 定义模块
        var moduleBuilder = assemblyBuilder.DefineDynamicModule("DynamicModule", "DynamicModule.dll");

        // 定义类型
        var typeBuilder = moduleBuilder.DefineType("DynamicType", TypeAttributes.Public);

        // 定义方法
        var methodBuilder = typeBuilder.DefineMethod(
            "DynamicMethod",
            MethodAttributes.Public | MethodAttributes.Static,
            typeof(void),
            Type.EmptyTypes);

        // 生成方法的IL代码
        var ilGenerator = methodBuilder.GetILGenerator();
        ilGenerator.Emit(OpCodes.Ldstr, "Hello, World!");
        ilGenerator.Emit(OpCodes.Call, typeof(Console).GetMethod("WriteLine", new Type[] { typeof(string) }));
        ilGenerator.Emit(OpCodes.Ret);

        // 创建类型
        var dynamicType = typeBuilder.CreateType();

        // 保存程序集到磁盘
        assemblyBuilder.Save("DynamicModule.dll");

        Console.WriteLine("Dynamic DLL created successfully.");
    }
}