克隆/复制将访问器主体转换为新类型

我在现有类型的动态装配中创建新类型，但仅包含所选属性：

I'm creating new type in dynamic assembly from existing type, but with only selected properties to include:

public class EmitTest
{
    public Type Create(Type prototype, Type dynamicBaseType, List<string> includedPropertyList)
    {
        AssemblyName aName = new AssemblyName("DynamicAssembly");
        AssemblyBuilder assemblyBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(
                aName,
                AssemblyBuilderAccess.RunAndSave);

        ModuleBuilder modulBuilder = assemblyBuilder.DefineDynamicModule(aName.Name, aName.Name + ".dll");


        string typeName = string.Concat(prototype.Name, "_DynamicType_", Guid.NewGuid().ToString().Replace("-", string.Empty));

        TypeBuilder typeBuilder = modulBuilder.DefineType(
            typeName,
            TypeAttributes.Public, null, new Type[] { });

        foreach (string s in includedPropertyList)
        {
            PropertyInfo propertyInfo = prototype.GetProperty(s);

            if (propertyInfo != null && dynamicBaseType.GetProperty(s) == null)
            {
                CreateProperty(typeBuilder, propertyInfo);
            }
        }

        return typeBuilder.CreateType();
    }

    #region Property Creation

    private void CreateProperty(TypeBuilder typeBuilder, PropertyInfo propertyInfo)
    {
        PropertyBuilder propertyBuilder = typeBuilder.DefineProperty(
            propertyInfo.Name,
            PropertyAttributes.HasDefault,
            propertyInfo.PropertyType,
            null);

        CreatePropertyBase(typeBuilder, propertyBuilder, propertyInfo);

        AddAttribute<BrowsableAttribute>(propertyBuilder, propertyInfo, CreatePropertyAttributeBrowsable);
        AddAttribute<DisplayNameAttribute>(propertyBuilder, propertyInfo, CreatePropertyAttributeDisplayName);          
    }

    private void CreatePropertyBase(TypeBuilder typeBuilder, PropertyBuilder propertyBuilder, PropertyInfo propertyInfo)
    {

        FieldBuilder fieldBuilder = typeBuilder.DefineField(
            string.Concat("m_", propertyInfo.Name),
            propertyInfo.PropertyType,
            FieldAttributes.Private);

        MethodAttributes getSetAttr = MethodAttributes.Public |
            MethodAttributes.SpecialName | MethodAttributes.HideBySig;


        MethodBuilder mbGetAccessor = typeBuilder.DefineMethod(
            string.Concat("get_", propertyInfo.Name),
            getSetAttr,
            propertyInfo.PropertyType,
            Type.EmptyTypes);

        ILGenerator mbGetIL = mbGetAccessor.GetILGenerator();
        mbGetIL.Emit(OpCodes.Ldarg_0);
        mbGetIL.Emit(OpCodes.Ldfld, fieldBuilder);
        mbGetIL.Emit(OpCodes.Ret);


        MethodBuilder mbSetAccessor = typeBuilder.DefineMethod(
            string.Concat("set_", propertyInfo.Name),
            getSetAttr,
            null,
            new Type[] { propertyInfo.PropertyType });

        ILGenerator mbSetIL = mbSetAccessor.GetILGenerator();           
        mbSetIL.Emit(OpCodes.Ldarg_0);
        mbSetIL.Emit(OpCodes.Ldarg_1);
        mbSetIL.Emit(OpCodes.Stfld, fieldBuilder);
        mbSetIL.Emit(OpCodes.Ret);

        propertyBuilder.SetGetMethod(mbGetAccessor);
        propertyBuilder.SetSetMethod(mbSetAccessor);
    }

    #endregion Property Creation

    #region Attribute Createion

    private void AddAttribute<T>(PropertyBuilder propertyBuilder, PropertyInfo propertyInfo, Action<PropertyBuilder, T> action)
        where T : Attribute
    {
        T attribute = ReflectionHelper.GetAttribute(propertyInfo, typeof(T), false) as T;

        if (attribute != null)
        {
            action(propertyBuilder, attribute);
        }
    }

    private void CreatePropertyAttributeBrowsable(PropertyBuilder propertyBuilder, BrowsableAttribute browsableAttribute)
    {
        ConstructorInfo myAttrCtor = typeof(BrowsableAttribute).GetConstructor(new Type[] { typeof(bool) });
        CustomAttributeBuilder myAttr = new CustomAttributeBuilder(myAttrCtor, new object[] { browsableAttribute.Browsable });
        propertyBuilder.SetCustomAttribute(myAttr);
    }

    private void CreatePropertyAttributeDisplayName(PropertyBuilder propertyBuilder, DisplayNameAttribute displayNameAttribute)
    {
        ConstructorInfo myAttrCtor2 = typeof(DisplayNameAttribute).GetConstructor(new Type[] { typeof(string) });
        CustomAttributeBuilder myAttr2 = new CustomAttributeBuilder(myAttrCtor2, new object[] { displayNameAttribute.DisplayName });
        propertyBuilder.SetCustomAttribute(myAttr2);
    }

    #endregion Attribute Createion
}

这一切都很好，但在这里我只创建只是获取或设置私有字段的简单属性。

This all works great, but here I'm creating only simple properties that just get or set private field.

我遇到了我有更复杂的属性的情况，例如在getter有类似：A + B * C其中A，B和

I ran into cases where I have more complex property, for example in getter there is something like: "A + B * C" where A,B and C are properties in same class.

我在CreatePropertyBase方法中创建了getter的副本，如下所示：

I tried creating copy of getter in CreatePropertyBase method like this:

        MethodBuilder mbNumberGetAccessor = typeBuilder.DefineMethod(
            string.Concat("get_", propertyInfo.Name),
            getSetAttr,
            propertyInfo.PropertyType,
            Type.EmptyTypes);       


        System.Reflection.MethodInfo mi = propertyInfo.GetGetMethod();
        byte[] body = mi.GetMethodBody().GetILAsByteArray();

        mbNumberGetAccessor.CreateMethodBody(body, body.Length);

这显然没有用。 ：）

我的问题是：是否有可能复制get访问器的body，它具有对同一类中其他属性的引用，如果可能的话， 。
我正在使用.NET 3.5 SP1

谢谢。