waniting solution of Error 25 type or namespace name 'view' does not exist in the namespace 'BL' (are you missing an assembly reference?)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using BL;

public partial class viewinstructor : System.Web.UI.Page
{
    BL.view objquery = new BL.view(ConfigurationManager.ConnectionStrings["reetu"].ToString());

    
    static DataTable dt = new DataTable();
    DataRow dr;
    SqlDataReader reader;
    protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = Session["Email"].ToString();
        dt = objquery.getinstructor1(Label1.Text);
        if (dt.Rows.Count > 0)
        {
            txtname.Text = dt.Rows[0]["Name"].ToString();
            txtusername.Text = dt.Rows[1]["UserName"].ToString();
            txtpassword.Text = dt.Rows[2]["Password"].ToString();
            txtaddress.Text = dt.Rows[3]["Address"].ToString();
            txtqualification.Text = dt.Rows[4]["Qualification"].ToString();
            radiolistgender.SelectedItem.Text = dt.Rows[5]["Gender"].ToString();
            txtcity.Text = dt.Rows[6]["City"].ToString();
            txtstate.Text = dt.Rows[7]["State"].ToString();
            txtzip.Text = dt.Rows[8]["Zip"].ToString();
            txtdepartment.Text = dt.Rows[9]["Departmant"].ToString();
            txtcontact.Text = dt.Rows[10]["Contact"].ToString();
            txtcreatedate.Text = dt.Rows[11]["CreatedDate"].ToString();

            //enableAll();
        }
        //else
        //{

        //disableAll();
        //}


        //objquery.updateinstructor(txtname.Text, txtusername.Text, txtpassword.Text, txtaddress.Text, txtqualification.Text, radiolistgender.SelectedItem.Text, txtcity.Text, txtstate.Text, txtzip.Text, txtdepartment.Text, txtcontact.Text, txtcreatedate.Text);
        //SqlConnection con = new SqlConnection(constr);
        //con.Open();


    }
         



            protected void btnsubmit_Click(object sender, EventArgs e)
            {
         
               

            }
    }