序列化：子类负责父类的序列化(如果父类未实现序列化)

using System;
using System.Runtime.Serialization;

//子类负责父类的序列化(如果父类未实现序列化)
namespace ConsoleApp_SerializableParentByChild
{
    class Program
    {
        static void Main(string[] args)
        {
            //子类负责父类的序列化(父类未实现序列化的情况)
            Employee employeeA = new Employee() { Name = "Zhang", Salary = 10000 };
            BinarySerializer.SerializeToFile(employeeA, @"c:", "person.txt");
            Employee employeeACopy = BinarySerializer.DeserializeFromFile<Employee>(@"c:person.txt");
            Console.WriteLine("姓名：{0}", employeeACopy.Name);
            Console.WriteLine("薪水：{0}", employeeACopy.Salary);
            Console.ReadKey();
        }
    }

    #region 父类未序列化的情况
    [Serializable]
    class Employee : Person, ISerializable
    {
        //父类Person未实现序列化的情况，由子类处理

        public int Salary { get; set; }

        public Employee()
        { }

        /// <summary>
        /// 取出信息(在反序列化时调用)
        /// </summary>
        protected Employee(SerializationInfo info, StreamingContext context)
        {
            Name = info.GetString("Name");//取父类的Name
            Salary = info.GetInt32("Salary");
        }

        /// <summary>
        /// 给属性赋值(在序列化时调用)
        /// </summary>
        void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
        {
            info.AddValue("Salary", Salary);
            info.AddValue("Name", Name);//序列化父类的Name
        }
    }

    class Person
    {
        public string Name { get; set; }
    }
    #endregion

    #region 父类序列化的情况

    //[Serializable]
    //class Person : ISerializable
    //{
    //    public string Name { get; set; }
    //    public Person() { }
    //    protected Person(SerializationInfo info, StreamingContext context)
    //    {
    //        Name = info.GetString("Name");
    //    }

    //    public virtual void GetObjectData(SerializationInfo info, StreamingContext context)
    //    {
    //        info.AddValue("Name", Name);
    //    }
    //}

    //[Serializable]
    //class Employee : Person, ISerializable
    //{
    //    //父类Person实现序列化的情况,子类只需调用base.GetObjectData即可

    //    public int Salary { get; set; }

    //    public Employee()
    //    {
    //    }

    //    /// <summary>
    //    /// 取出信息(在反序列化时调用)
    //    /// </summary>
    //    protected Employee(SerializationInfo info, StreamingContext context)
    //    {
    //        Salary = info.GetInt32("Salary");
    //        Name = info.GetString("Name");
    //    }

    //    /// <summary>
    //    /// 给属性赋值(在序列化时调用)
    //    /// </summary>
    //    void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
    //    {
    //        base.GetObjectData(info, context);
    //        info.AddValue("Salary", Salary);
    //    }
    //}
    #endregion
}

工具类：

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

namespace ConsoleApp_SerializableParentByChild
{
    public class BinarySerializer
    {
        /// <summary>
        /// 将类型序列化为字符串
        /// </summary>
        public static string Serialize<T>(T t)
        {
            using (MemoryStream stream = new MemoryStream())
            {
                BinaryFormatter formatter = new BinaryFormatter();
                formatter.Serialize(stream, t);
                return System.Text.Encoding.UTF8.GetString(stream.ToArray());
            }
        }

        /// <summary>
        /// 将类型序列化为文件
        /// </summary>
        public static void SerializeToFile<T>(T t, string path, string fullname)
        {
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            string fullPath = string.Format(@"{0}{1}", path, fullname);
            using (FileStream stream = new FileStream(fullPath, FileMode.OpenOrCreate))
            {
                BinaryFormatter formatter = new BinaryFormatter();
                formatter.Serialize(stream, t);
                stream.Flush();
            }
        }

        /// <summary>
        /// 将字符串反序列化为类型
        /// </summary>
        public static TResult Deserialize<TResult>(string s) where TResult : class
        {
            byte[] bs = System.Text.Encoding.UTF8.GetBytes(s);
            using (MemoryStream stream = new MemoryStream(bs))
            {
                BinaryFormatter formatter = new BinaryFormatter();
                return formatter.Deserialize(stream) as TResult;
            }
        }

        /// <summary>
        /// 将文件反序列化为类型
        /// </summary>
        public static TResult DeserializeFromFile<TResult>(string path) where TResult : class
        {
            using (FileStream stream = new FileStream(path, FileMode.Open))
            {
                BinaryFormatter formatter = new BinaryFormatter();
                return formatter.Deserialize(stream) as TResult;
            }
        }
    }
}