c# 深拷贝各种实现方式

1：利用反射实现

  public T DeepCopy<T>(T obj)
        {
           object retval= Activator.CreateInstance(typeof(T));
            PropertyInfo[] pis = typeof(T).GetProperties();
            foreach (PropertyInfo pi in pis)
            {
                try{pi.SetValue(retval, pi.GetValue(obj, null), null);  }
                catch{  }
            }
            return (T)retval; 
        }

2：利用xml序列化和反序列化实现

   public T DeepCopy<T>(T obj)
        {
            object retval;
            using (MemoryStream ms = new MemoryStream())
            {
                XmlSerializer xml = new XmlSerializer(typeof(T));
                xml.Serialize(ms, obj);
                ms.Seek(0, SeekOrigin.Begin);
                retval = xml.Deserialize(ms);
                ms.Close();
            }
            return (T)retval;
        }

3：利用二进制序列化和反序列化实现

public static T DeepCopy<t>(T obj)
{
    object retval;
    using (MemoryStream ms = new MemoryStream())
    {
        BinaryFormatter bf = new BinaryFormatter();
        //序列化成流
        bf.Serialize(ms, obj);
        ms.Seek(0, SeekOrigin.Begin);
        //反序列化成对象
        retval = bf.Deserialize(ms);
        ms.Close();
    }
    return (T)retval;
}

4：利用silverlight DataContractSerializer实现，用于在silverlight 客户端使用

   public static T DeepCopy<T>(T obj)
        {
            object retval;
            using (MemoryStream ms = new MemoryStream())
            {
                DataContractSerializer ser = new DataContractSerializer(typeof(T));
                ser.WriteObject(ms, obj);
                ms.Seek(0, SeekOrigin.Begin);
                retval = ser.ReadObject(ms);
                ms.Close();
            }
            return (T)retval;
}