c# - DeepClone

using Newtonsoft.Json;
using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

namespace FactorAutoDiscover
{
    /// <summary>
    /// Reference Articles:
    /// https://stackoverflow.com/questions/78536/deep-cloning-objects
    /// http://www.codeproject.com/KB/tips/SerializedObjectCloner.aspx
    /// Provides a method for performing a deep copy of an object.
    /// Binary Serialization is used to perform the copy.
    /// </summary>
    public static class Extension
    {
        /// <summary>
        /// Perform a deep Copy of the object.
        /// </summary>
        /// <typeparam name="T">The type of object being copied.</typeparam>
        /// <param name="source">The object instance to copy.</param>
        /// <returns>The copied object.</returns>
        public static T MemoryClone<T>(this T source)
        {
            if (!typeof(T).IsSerializable)
            {
                throw new ArgumentException("The type must be serializable.", "source");
            }

            // Don't serialize a null object, simply return the default for that object
            if (Object.ReferenceEquals(source, null))
            {
                return default(T);
            }

            IFormatter formatter = new BinaryFormatter();
            Stream stream = new MemoryStream();
            using (stream)
            {
                formatter.Serialize(stream, source);
                stream.Seek(0, SeekOrigin.Begin);
                return (T)formatter.Deserialize(stream);
            }
        }
        
        /// <summary>
        /// Perform a deep Copy of the object, using Json as a serialisation method. NOTE: Private members are not cloned using this method.
        /// </summary>
        /// <typeparam name="T">The type of object being copied.</typeparam>
        /// <param name="source">The object instance to copy.</param>
        /// <returns>The copied object.</returns>
        public static T CloneJson<T>(this T source)
        {
            // Don't serialize a null object, simply return the default for that object
            if (source == null)
            {
                return default(T);
            }

            // initialize inner objects individually
            // for example in default constructor some list property initialized with some values,
            // but in 'source' these items are cleaned -
            // without ObjectCreationHandling.Replace default constructor values will be added to result
            var deserializeSettings = new JsonSerializerSettings { ObjectCreationHandling = ObjectCreationHandling.Replace };

            return JsonConvert.DeserializeObject<T>(JsonConvert.SerializeObject(source), deserializeSettings);
        }
    }
}

如果有必要，需要引入Newtonsoft.Json。