1.Top 查询－－－－skip(index).Take(count)

      var Results = from dt in ctx.Customers.Skip(0).Take(10)
                              select new
                              ...{
                                  dt.CustomerID,
                                  dt.CompanyName,
                                  dt.City
                              };

    2.Like 查询－－－－startwith()
               from dt in ctx.Customers
               where dt.ID.Startwith('A')

    3.In查询－－－－Contain()
      string[] s = ...{ "ivan","aaa","aaaa"};
                var Results = from dt in ctx.Customers.Skip(0).Take(10)
                              where s.Contains(dt.CustomerID)
                              select new
                              ...{
                                  dt.CustomerID,
                                  dt.CompanyName,
                                  dt.City
                              };