由于这个问题的几乎所有答案都不令人满意，或者在我的情况下显然不起作用，我编写了AnyClone，它完全通过反思实现，并解决了这里的所有需求。我无法让序列化在结构复杂的复杂场景中工作，IClonable也不太理想——事实上，它甚至没有必要。

使用[IgnoreDataMember]、[NonSerialized]支持标准忽略属性。支持复杂集合、不带setter的财产、只读字段等。

我希望这能帮助其他遇到我同样问题的人。

对@Konrad和@craastad的添加，使用内置的System.Text.Json for.NET>5

https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-how-to?pivots=dotnet-5-0

方法：

public static T Clone<T>(T source)
{
    var serialized = JsonSerializer.Serialize(source);
    return JsonSerializer.Deserialize<T>(serialized);
}

扩展方法：

public static class SystemExtension
{
    public static T Clone<T>(this T source)
    {
        var serialized = JsonSerializer.Serialize(source);
        return JsonSerializer.Deserialize<T>(serialized);
    }
}

使用IClonable接口可以花费多少精力是令人难以置信的，尤其是当您有大量的类层次结构时。MemberwiseColone的工作方式也很奇怪——它甚至不能完全克隆普通的List类型的结构。

当然，串行化最有趣的困境是串行化反向引用——例如，具有子-父关系的类层次结构。我怀疑二进制序列化程序能否在这种情况下帮助您。（最终将导致递归循环+堆栈溢出）。

不知怎么的，我喜欢这里提出的解决方案：如何在.NET（特别是C#）中对对象进行深度复制？

然而，它不支持Lists，并补充说，该支持还考虑到了重新养育子女的问题。对于我制定的仅为父项的规则，该字段或属性应命名为“parent”，则DeepClone将忽略它。您可能需要决定自己的反向引用规则——对于树层次结构，它可能是“左/右”等。。。

以下是包含测试代码的完整代码片段：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Text;

namespace TestDeepClone
{
    class Program
    {
        static void Main(string[] args)
        {
            A a = new A();
            a.name = "main_A";
            a.b_list.Add(new B(a) { name = "b1" });
            a.b_list.Add(new B(a) { name = "b2" });

            A a2 = (A)a.DeepClone();
            a2.name = "second_A";

            // Perform re-parenting manually after deep copy.
            foreach( var b in a2.b_list )
                b.parent = a2;


            Debug.WriteLine("ok");

        }
    }

    public class A
    {
        public String name = "one";
        public List<String> list = new List<string>();
        public List<String> null_list;
        public List<B> b_list = new List<B>();
        private int private_pleaseCopyMeAsWell = 5;

        public override string ToString()
        {
            return "A(" + name + ")";
        }
    }

    public class B
    {
        public B() { }
        public B(A _parent) { parent = _parent; }
        public A parent;
        public String name = "two";
    }


    public static class ReflectionEx
    {
        public static Type GetUnderlyingType(this MemberInfo member)
        {
            Type type;
            switch (member.MemberType)
            {
                case MemberTypes.Field:
                    type = ((FieldInfo)member).FieldType;
                    break;
                case MemberTypes.Property:
                    type = ((PropertyInfo)member).PropertyType;
                    break;
                case MemberTypes.Event:
                    type = ((EventInfo)member).EventHandlerType;
                    break;
                default:
                    throw new ArgumentException("member must be if type FieldInfo, PropertyInfo or EventInfo", "member");
            }
            return Nullable.GetUnderlyingType(type) ?? type;
        }

        /// <summary>
        /// Gets fields and properties into one array.
        /// Order of properties / fields will be preserved in order of appearance in class / struct. (MetadataToken is used for sorting such cases)
        /// </summary>
        /// <param name="type">Type from which to get</param>
        /// <returns>array of fields and properties</returns>
        public static MemberInfo[] GetFieldsAndProperties(this Type type)
        {
            List<MemberInfo> fps = new List<MemberInfo>();
            fps.AddRange(type.GetFields());
            fps.AddRange(type.GetProperties());
            fps = fps.OrderBy(x => x.MetadataToken).ToList();
            return fps.ToArray();
        }

        public static object GetValue(this MemberInfo member, object target)
        {
            if (member is PropertyInfo)
            {
                return (member as PropertyInfo).GetValue(target, null);
            }
            else if (member is FieldInfo)
            {
                return (member as FieldInfo).GetValue(target);
            }
            else
            {
                throw new Exception("member must be either PropertyInfo or FieldInfo");
            }
        }

        public static void SetValue(this MemberInfo member, object target, object value)
        {
            if (member is PropertyInfo)
            {
                (member as PropertyInfo).SetValue(target, value, null);
            }
            else if (member is FieldInfo)
            {
                (member as FieldInfo).SetValue(target, value);
            }
            else
            {
                throw new Exception("destinationMember must be either PropertyInfo or FieldInfo");
            }
        }

        /// <summary>
        /// Deep clones specific object.
        /// Analogue can be found here: https://stackoverflow.com/questions/129389/how-do-you-do-a-deep-copy-an-object-in-net-c-specifically
        /// This is now improved version (list support added)
        /// </summary>
        /// <param name="obj">object to be cloned</param>
        /// <returns>full copy of object.</returns>
        public static object DeepClone(this object obj)
        {
            if (obj == null)
                return null;

            Type type = obj.GetType();

            if (obj is IList)
            {
                IList list = ((IList)obj);
                IList newlist = (IList)Activator.CreateInstance(obj.GetType(), list.Count);

                foreach (object elem in list)
                    newlist.Add(DeepClone(elem));

                return newlist;
            } //if

            if (type.IsValueType || type == typeof(string))
            {
                return obj;
            }
            else if (type.IsArray)
            {
                Type elementType = Type.GetType(type.FullName.Replace("[]", string.Empty));
                var array = obj as Array;
                Array copied = Array.CreateInstance(elementType, array.Length);

                for (int i = 0; i < array.Length; i++)
                    copied.SetValue(DeepClone(array.GetValue(i)), i);

                return Convert.ChangeType(copied, obj.GetType());
            }
            else if (type.IsClass)
            {
                object toret = Activator.CreateInstance(obj.GetType());

                MemberInfo[] fields = type.GetFieldsAndProperties();
                foreach (MemberInfo field in fields)
                {
                    // Don't clone parent back-reference classes. (Using special kind of naming 'parent' 
                    // to indicate child's parent class.
                    if (field.Name == "parent")
                    {
                        continue;
                    }

                    object fieldValue = field.GetValue(obj);

                    if (fieldValue == null)
                        continue;

                    field.SetValue(toret, DeepClone(fieldValue));
                }

                return toret;
            }
            else
            {
                // Don't know that type, don't know how to clone it.
                if (Debugger.IsAttached)
                    Debugger.Break();

                return null;
            }
        } //DeepClone
    }

}

保持简单，并使用AutoMapper，正如其他人提到的，这是一个简单的小库，可以将一个对象映射到另一个对象。。。要将一个对象复制到另一个具有相同类型的对象，只需要三行代码：

MyType source = new MyType();
Mapper.CreateMap<MyType, MyType>();
MyType target = Mapper.Map<MyType, MyType>(source);

目标对象现在是源对象的副本。不够简单？创建扩展方法以在解决方案中的任何地方使用：

public static T Copy<T>(this T source)
{
    T copy = default(T);
    Mapper.CreateMap<T, T>();
    copy = Mapper.Map<T, T>(source);
    return copy;
}

扩展方法可以如下使用：

MyType copy = source.Copy();

基本上，您需要实现ICloneable接口，然后实现对象结构复制。如果它是所有成员的深度拷贝，您需要确保（与您选择的解决方案无关）所有子级都是可克隆的。有时，在这个过程中，您需要注意一些限制，例如，如果您复制ORM对象，大多数框架只允许一个对象附加到会话，并且您不能克隆该对象，或者如果可能，您需要关注这些对象的会话附加。

干杯

我在Silverlight中使用ICloneable时遇到了问题，但我喜欢序列化的想法，我可以序列化XML，所以我这样做了：

static public class SerializeHelper
{
    //Michael White, Holly Springs Consulting, 2009
    //michael@hollyspringsconsulting.com
    public static T DeserializeXML<T>(string xmlData) 
        where T:new()
    {
        if (string.IsNullOrEmpty(xmlData))
            return default(T);

        TextReader tr = new StringReader(xmlData);
        T DocItms = new T();
        XmlSerializer xms = new XmlSerializer(DocItms.GetType());
        DocItms = (T)xms.Deserialize(tr);

        return DocItms == null ? default(T) : DocItms;
    }

    public static string SeralizeObjectToXML<T>(T xmlObject)
    {
        StringBuilder sbTR = new StringBuilder();
        XmlSerializer xmsTR = new XmlSerializer(xmlObject.GetType());
        XmlWriterSettings xwsTR = new XmlWriterSettings();
        
        XmlWriter xmwTR = XmlWriter.Create(sbTR, xwsTR);
        xmsTR.Serialize(xmwTR,xmlObject);
        
        return sbTR.ToString();
    }

    public static T CloneObject<T>(T objClone) 
        where T:new()
    {
        string GetString = SerializeHelper.SeralizeObjectToXML<T>(objClone);
        return SerializeHelper.DeserializeXML<T>(GetString);
    }
}