Internet TRANSACTION Script

Can Some One help me to resolve this error that i am geting on my application

I am using autogenerated code from Object Relational designer that is Name.designer.cs to connect to my sql database but i am getting this error

Default.aspx

            AutoGenerateColumns="False">
           
               
                   
               
                                    HeaderText="Deposit">
                   
               
               
                   
               
              
               
           
       

the code Behind (default.aspx.cs)
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

NameDataContext bdc = newNameDataContext();
            GridView1.DataSource = bdc.RecentTransactions(
                 Decimal.Parse(Session["Number"].ToString()));
            GridView1.DataBind();

Error    4    'NameDataContext' does not contain a definition for 'RecentTransactions' and no extension method 'RecentTransactions' accepting a first argument of type 'NameDataContext' could be found (are you missing a using directive or an assembly reference?)    C:\Users\Default.aspx.cs    21    40   

Is it that i have not referenced an assembly or dll file that is making me have that error of RecentTransactions....thanks

I am Grateful