Implementing Deep Cloning via Serializing objects使用Serializable来实现深拷贝

Using the Code

This is a helper class that can be used to perform a deep copy of an object:

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using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;     
      
/// <summary>
/// Provides a method for performing a deep copy of an object.
/// Binary Serialization is used to perform the copy.
/// </summary>
public static class ObjectCopier
{
 /// <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 Clone<T>(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);
  }
 }
}

Usage of this class becomes ObjectCopier.Clone(objectBeingCloned);.

Points of Interest

In case you prefer to use the new Extension methods of C# 3.0, change the method to have the following signature:

   public static T Clone<T>(this T source)
   {
      ...
   }

Now the method call simply becomes objectBeingCloned.Clone();.