如何使用反射映射集合属性

嗨，我有这些源类和目标类，并且在映射ICollection SomeClasses｛get；set｝属性时遇到了麻烦。我已经简化了它们，但实际的类相当复杂。

public class Source
    {
        public string Name{get; set;}
        public ICollection<SomeClass> SomeClasses {get;set}
    }
    public class Result
    {
        public string Name{get; set;}
        public ICollection<SomeClass> SomeClasses {get;set}
    }
    public class SomeClass
    {
        public string Name {get; set;}
        public string SomeThing {get;set}
    }

这是我玩的代码，运气不好。

public object Map(object source, object result)
        {           
            foreach (PropertyInfo item in source.GetType().GetRuntimeProperties())
            {
                if (item.PropertyType.IsGenericType && item.PropertyType.GetInterface(typeof(IEnumerable<>).FullName) != null)
                {
                    Type type = item.PropertyType.GetGenericArguments()[0];
                    var innerObj = FormatterServices.GetUninitializedObject(type);
                    var listType = typeof(List<>);
                    var constructedListType = listType.MakeGenericType(innerObj.GetType());
                    var newList = (IList)Activator.CreateInstance(constructedListType);
                    IEnumerable listValue = (IEnumerable)item.GetValue(source);
                    IEnumerable listValue = (IEnumerable)item.GetValue(source);
                    //newList.Add(innerObj);
                    //item.SetValue(source, newList);
                    foreach (var val in listValue)
                    {
                        newList.Add(val);
                    }
                    //list.Add(obj4);
                    //option a
                    //result.GetType().GetRuntimeProperty(item.Name).SetValue(result, newList);
    //option b
    result.GetType().GetRuntimeProperty(item.Name).SetValue(result, item.GetValue(source));
                }
            }
        }