LINQ Insert Update Delete

ASPX.CS

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class Default2 : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void btnSubmit_Click(object sender, EventArgs e)

    {

        Class1 obj = new Class1();

        obj.insert(txtname.Text, txtaddress.Text);

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        Class1 obj = new Class1();

        obj.delete(Convert.ToInt32(txtid.Text));

    }

}

Class file

using System;

using System.Collections.Generic;

using System.Linq;

using System.Data.Linq;

using System.Web;

using System.Configuration;

/// <summary>

/// Summary description for Class1

/// </summary>

public class Class1

{

    public string aaa = ConfigurationManager.ConnectionStrings["nareshConnectionString"].ToString();

    DataClassesDataContext aaaa = new DataClassesDataContext();

    public Class1()

    {

        //

        // TODO: Add constructor logic here

        //

    }

    public void insert(string name, string address)

    {

        T_Linq obj = new T_Linq();

        //obj.id = id;

        obj.name = name;

        obj.address = address;

        aaaa.T_Linqs.InsertOnSubmit(obj);

        aaaa.SubmitChanges();

    }

    public void delete(int id)

    {

        T_Linq objid = (from p in aaaa.T_Linqs

                          where p.id == id

                          select p).SingleOrDefault();

        objid.id = id;

        aaaa.T_Linqs.DeleteOnSubmit(objid);

        aaaa.SubmitChanges();

    }

}