using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Text;

 using System.IO;

 using System.Runtime.Serialization.Formatters.Binary;

 namespace WpfApplication1

 {

    public  static class FileDateDo

     {

         public static T getFileDate<T>(string filePath) where T : new()

         {

             if (!File.Exists(filePath))

             {

                 return default(T);

             }

             T t = new T();

             FileStream fs = new FileStream(filePath, FileMode.Open);

             if (fs.Length < ) { return t; }

             BinaryFormatter bf = new BinaryFormatter();

             t = (T)(bf.Deserialize(fs));

             fs.Close();

             return t;

         }

         public static void Save<T>(string filePath, List<T> t)

         {

             try

             {

                 using (FileStream fss = new FileStream(filePath, FileMode.Create))

                 {

                     BinaryFormatter bs = new BinaryFormatter();

                     bs.Serialize(fss, t);

                 }

             }

             catch (Exception)

             {

                 throw;

             }

         }

     }

 }