以编程方式在C#中动态定义类中的属性

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

public class Program
{
    public static void Main()
    {
        // 创建一个动态程序集
        AssemblyName assemblyName = new AssemblyName("DynamicAssembly");
        AssemblyBuilder assemblyBuilder = AssemblyBuilder.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.Run);
        
        // 创建一个动态模块
        ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("DynamicModule");
        
        // 创建一个动态类型
        TypeBuilder typeBuilder = moduleBuilder.DefineType("DynamicClass", TypeAttributes.Public);
        
        // 定义一个属性
        PropertyBuilder propertyBuilder = typeBuilder.DefineProperty("DynamicProperty", PropertyAttributes.HasDefault, typeof(string), null);
        
        // 定义属性的getter和setter方法
        MethodBuilder getterBuilder = typeBuilder.DefineMethod("get_DynamicProperty", MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, typeof(string), Type.EmptyTypes);
        ILGenerator getterIL = getterBuilder.GetILGenerator();
        getterIL.Emit(OpCodes.Ldstr, "DynamicProperty value");
        getterIL.Emit(OpCodes.Ret);
        propertyBuilder.SetGetMethod(getterBuilder);
        
        MethodBuilder setterBuilder = typeBuilder.DefineMethod("set_DynamicProperty", MethodAttributes.Public | MethodAttributes.SpecialName | MethodAttributes.HideBySig, null, new Type[] { typeof(string) });
        ILGenerator setterIL = setterBuilder.GetILGenerator();
        setterIL.Emit(OpCodes.Ret);
        propertyBuilder.SetSetMethod(setterBuilder);
        
        // 创建类型
        Type dynamicType = typeBuilder.CreateType();
        
        // 创建对象
        object dynamicObject = Activator.CreateInstance(dynamicType);
        
        // 使用动态属性
        PropertyInfo dynamicProperty = dynamicType.GetProperty("DynamicProperty");
        dynamicProperty.SetValue(dynamicObject, "Hello, World!");
        string value = (string)dynamicProperty.GetValue(dynamicObject);
        Console.WriteLine(value);
    }
}