遭遇反序列化异常:"在分析完成之前就遇到流结尾"

 1public static object GetFormatter(string filePath)
 2{
 3  object result = null;
 4   try
 5    {
 6      BinaryFormatter formatter=new BinaryFormatter();
 7                if (System.IO.File.Exists(filePath))
 8                {
 9                    FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite);
10                    //file.Seek(0, SeekOrigin.Begin);
11                    file.Position = 0;
12                    file.Seek(0, SeekOrigin.Begin);
13                    result=(object)formatter.Deserialize(file);
14                    file.Close();
15                }
16            }
17            catch (SerializationException ex)
18            {
19                throw new Exception(ex.ToString());
20                //return null;
21            }
22            return result;
23        }

 1        public static bool Formatter(object obj,string filePath)
 2        {
 3            try
 4            {
 5                IFormatter formatter = new BinaryFormatter();
 6                if (!System.IO.File.Exists(filePath))// 创建文件
 7                {
 8                    System.IO.FileStream fs = System.IO.File.Create(filePath);
 9                    formatter.Serialize(fs, obj);
10                    fs.Close();
11                }
12            }
13            catch (SerializationException)
14            {
15                return false;
16            }
17            return true;
18        }
序列化正常，反序列化就报如题错误!