Entity Framework中实现指定字段更新

        static void Main(string[] args)
        {
            Database.SetInitializer<BaseDB>(null);
            BaseDB context = new BaseDB();
            var book = new Book { ISBN = "isbn002", Title = "title004" };
            context.BookEntity.Attach(book);
            var stateEntry = ((IObjectContextAdapter)context).ObjectContext.
                ObjectStateManager.GetObjectStateEntry(book);
            stateEntry.SetModifiedProperty("Title");
            context.SaveChanges();

            Console.ReadKey();
        }

exec sp_executesql N'update [dbo].[Book]
set [Title] = @0
where ([ISBN] = @1)
',N'@0 nvarchar(max) ,@1 nvarchar(128)',@0=N'title004',@1=N'isbn002'