Regstration form data enter & entry in the data base

ALTER PROCEDURE seller_insert
	{
	    @User_Name nvarchar(20),
		@Password nvarchar(30),
		@First_Name nvarchar(20),
		@Last_Name nvarchar(20),
		@Address nvarchar(50),
		@Gender nvarchar(10),
		@Dob nvarchar(10),
		@E_Mail nvarchar(30),
		@Store_Name nvarchar(50),
		@StoreWebSite nvarchar(50),
		@Postal_No nvarchar(50)

	}
AS
insert into tbl_RegSeller(User_Name,Password,First_Name,Last_Name,Address,Gender,Dob,E_Mail,Store_Name,StoreWebSite,Postal_No) Values(@User_Name,@Password,@First_Name,@Last_Name,@Address,@Gender,@Dob,@E_Mail,@Store_Name,@StoreWebSite,@Postal_No) 
	
	RETURN

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

/// <summary>
/// Summary description for SELLERREGBAL
/// </summary>
public class SELLERREGBAL
{
    SELLERREGDAL dal = new SELLERREGDAL();
    SqlConnection con = new SqlConnection();
    SqlCommand cmd = new SqlCommand();
    SqlDataAdapter da = new SqlDataAdapter();

    public SELLERREGBAL()
    {
        con = new SqlConnection(ConfigurationManager.ConnectionStrings["shop"].ConnectionString);
 
    }
    public void insert(SELLERREGDAL dal)
        (
    
           con.open();
           cmd = new SqlConnection("Seller_insert",con);
           cmd.commandtype = CommandType.Storedprocedure;
           cmd.Parameters.AddWithValue("@User_Name", dal.User_Name);
           cmd.Parameters.AddWithValue("@Password", dal.Password);
           cmd.Parameters.AddWithValue("@First_Name", dal.First_Name);
           cmd.Parameters.AddWithValue("@Last_Name", dal.Last_Name);
           cmd.Parameters.AddWithValue("@Address", dal.Address);
           cmd.Parameters.AddWithValue("@Gender", dal.Gender);
           cmd.Parameters.AddWithValue("@Dob", dal.Dob);
           cmd.Parameters.AddWithValue("@E_Mail", dal.E_Mail);
           cmd.Parameters.AddWithValue("@Store_Name", dal.Store_Name);
           cmd.Parameters.AddWithValue("@StoreWebSite", dal.StoreWebSite); 
           cmd.Parameters.AddWithValue("@Postal_No", dal.Postal_No); 
           cmd.ExecuteNonQuery();
           con.Close();

   }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for SELLERREGDAL
/// </summary>
public class SELLERREGDAL
{
    public SELLERREGDAL()
    {
        //
        // TODO: Add constructor logic here
        //
    }
    public int seller_id ( get;  set; )
    public string User_Name (get; set; )
    public string password  (get; set; )
    public string First_Name (get; set; )
    public string Last_Name (get; set; )
    public string Address (get; set; )
    public string Gender (get; set; )
    public string Dob (get; set; )
    public string E_Mail (get; set; )
    public string Store_Name (get; set; )
    public string Storewebsite (get; set; )
    public string Postal_No (get; set; )

 }