Discussion: Using XMLSerialize serialization and deserialization

Concept: XML serialization is the process of converting common fields and properties to sequence format (XML in this case) for storage or transport. Deserialization recreates the original state of the object from XML.

    class SerializeDemo
    {
        static void Main()
        {
            EmployeeCollection employeeCollection = new EmployeeCollection()
            {
                Employees = Employeer.Employees()
            };
            XmlSerializer serialize = new XmlSerializer(typeof(EmployeeCollection));
            string filePath = @"E:\PProject\Test\Employee.xml";
             SerializeEmployee(serialize, filePath, employeeCollection);
            DeserializeEmployee(serialize, filePath);
        }
        static void SerializeEmployee(XmlSerializer serialize, string filePath, EmployeeCollection employeeCollection)
        {
            using (FileStream fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
            {
                serialize.Serialize(fs, employeeCollection);
            }
        }
        static void DeserializeEmployee(XmlSerializer serialize,string filePath)
        {
            using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                EmployeeCollection collection = (EmployeeCollection)serialize.Deserialize(fs);
                collection.Employees.ForEach(e => Console.WriteLine("Name:{0},Gender:{1},Age:{2},Education:{3}", e.userName, e.gender, e.age, e.education));
            }
        }
    }
    [Serializable]
    public class EmployeeCollection
    {
        public List<Employeer> Employees { get; set; }
    }
    [Serializable]
    public class Employeer
    {
        public string userId { get; set; }
        public string userName { get; set; }
        public string gender { get; set; }
        public int age { get; set; }
        public List<WorkExperience> workExperience { get; set; }
        public string education { get; set; }
        public static List<Employeer> Employees()
        {
           return new List<Employeer>()
           {
                new Employeer() 
                {   
                    userId = "0001",
                    userName = "guoHu",
                    gender="Man",
                    age=25,education="underGraduate",
                    workExperience = WorkExperience.GetWorkExperience("0001")
                }
           };

        }
    }
    [Serializable]
    public class WorkExperience
    {
        public string userId { get; set; }
        public string companyName { get; set; }
        public string seniority { get; set; }

        public static List<WorkExperience> GetWorkExperience(string userId)
        {
            List<WorkExperience> workExperience = new List<WorkExperience>();
            Unity unity = Unity.GetInstance();
            DataTable table = new DataTable();
            unity.GetTable(out table);

            var experiences = (from experience in table.AsEnumerable()
                               where experience.Field<string>("UserId") == userId
                               select new
                               {
                                   companyName = experience.Field<string>("CompanyName"),
                                   seniority = experience.Field<string>("Seniority")
                               }).ToList();
            experiences.ForEach(e => workExperience.Add(new WorkExperience() { companyName = e.companyName, seniority = e.seniority }));
            return workExperience;
        }
    }
    public class Unity
    {
        public static DataTable tables = new DataTable();
        public static DataRow dr;
        public static DataColumn dc = new DataColumn();
        public static object objLock = new object();
        public static Unity unityInstance;
        private Unity()
        {

        }
        public static Unity GetInstance()
        {
            if (unityInstance == null)
            {
                lock (objLock)
                {
                    if (unityInstance == null)
                    {
                        unityInstance = new Unity();
                    }
                }
            }
            return unityInstance;
        }
        public void GetTable(out DataTable dt)
        {
            unityInstance.CreateTable();

            dr = tables.NewRow();
            dr["UserId"] = "0001";
            dr["CompanyName"] = "WireSoft";
            dr["Seniority"] = "2012.02-2012.05";
            tables.Rows.Add(dr);
            dr = tables.NewRow();
            dr["UserId"] = "0001";
            dr["CompanyName"] = "Jin Xun";
            dr["Seniority"] = "2009.07-2011.02";
            tables.Rows.Add(dr);
            dr = tables.NewRow();
            dr["UserId"] = "0002";
            dr["CompanyName"] = "Hua Wei";
            dr["Seniority"] = "2011.07-";
            tables.Rows.Add(dr);
            dt = tables.Copy();
        }
        public  void CreateTable()
        {
            dc = new DataColumn("UserId", System.Type.GetType("System.String"));
            tables.Columns.Add(dc);
            dc = new DataColumn("companyName", System.Type.GetType("System.String"));
            tables.Columns.Add(dc);
            dc = new DataColumn("seniority", System.Type.GetType("System.String"));
            tables.Columns.Add(dc);
        }
    }