asp.net 企业门户网编译错，各位帮帮忙

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Data.SqlClient;//引入命名空间
using EP;

public partial class _Default : System.Web.UI.Page
{
    EP ep = new EP();//实例化一个对象
    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session[\”UserName\”] != null || Session[\”UserPwd\”] != null)
        {
            this.LblInfo.Text = \”您好！ \” + Session[\”UserName\”].ToString() + \” 欢迎您登录本网站！\”;
            Panel2.Visible = true;
            Panel1.Visible = false;
        }
        else
        {
           
            Panel2.Visible = false;
            Panel1.Visible = true;
        }
        ep.EXECDataList(dlSoftIntro, \”select top 4 * from tb_Tools order by UPTime desc\”, \”Id\”);
    }

    protected void ImgBtnLogin_Click(object sender, ImageClickEventArgs e)
    {

        if (this.TxtUserName.Text == string.Empty)
        {
            Response.Write(\”<script language=javascript>alert(\’用户名不能为空！\’);location=\’Default.aspx\'</script>\”);
            return;
        }
        else
        {
            if (this.TxtCode.Text == Request.Cookies[\”CheckCode\”].Value)
            {

                string SqlStr = \”select count(*) from tb_UserLogin where UserName=\’\” + this.TxtUserName.Text + \”\’and UserPwd=\’\” + this.TxtUserPwd.Text + \”\’\”;
                int a = ep.EXECuteScalar(SqlStr);
                if (a >= 1)
                {
                    Session[\”UserName\”] = this.TxtUserName.Text;
                    Session[\”UserPwd\”] = this.TxtUserPwd.Text;
                    Response.Write(\”<script lanuage=\’javaScript\’>alert(\’恭喜您！！登录成功！\’);location=\’Default.aspx\'</script>\”);//弹出对话框显示“恭喜您！！登录成功！”
                    Panel2.Visible = true;
                    Panel1.Visible = false;
                }
                else
                {
                    Response.Write(\”<script lanuage=\’javaScript\’>alert(\’很遗憾！！登录失败！\’);location=\’Default.aspx\'</script>\”);//弹出对话框显示“很遗憾！！登录失败！”
                }
            }
            else
            {
                Response.Write(\”<script language=javascript>alert(\’输入的验证码不正确！\’);location=\’Default.aspx\'</script>\”);
            }
        }
    }
    protected void LinBtnReg_Click(object sender, EventArgs e)
    {
        Response.Redirect(\”~/Register/RegPro.aspx\”);//跳转到注册协议页面
    }
    protected void LinBtnforgetPwd_Click(object sender, EventArgs e)
    {
        Response.Redirect(\”~/FindPwd/Findpwd1.aspx\”);//跳转到找回密码第一步的页面中
    }

    protected void LinBtnAdmin_Click(object sender, EventArgs e)
    {
        Response.Redirect(\”~/AdminLogin.aspx\”);//跳转到管理员登录页面
    }
    protected void dlSoftIntro_ItemCommand(object source, DataListCommandEventArgs e)
    {
        if (e.CommandName == \”Xiangxi\”)
        {
            Response.Redirect(\”list_softdownload.aspx\”);//将页面跳转到list_softdownload.aspx页面中
        }
    }
    protected void LinBtnMoreSoft_Click(object sender, EventArgs e)
    {
        Response.Redirect(\”More_Soft.aspx\”);//跳转到More_Soft.aspx页面中
    }

    protected void ImgBtnCancel_Click(object sender, ImageClickEventArgs e)
    {
        /*清空文本框*/
        this.TxtUserName.Text = \”\”;
        this.TxtUserPwd.Text = \”\”;
        this.TxtCode.Text = \”\”;
    }
    protected void LinBtnExit_Click(object sender, EventArgs e)
    {
        Session[\”UserName\”] = null;
        Session[\”UserPwd\”] = null;
        this.Panel1.Visible = true;
        this.Panel2.Visible = false;
    }
  
}

程序报错，怎么回事，各位帮帮忙哦，万分感谢！弄好的，我直接加分

错误 1 找不到类型或命名空间名称“EP”(是否缺少 using 指令或程序集引用?) F:/Enterprise/control/New.ascx.cs 15 

错误 2 找不到类型或命名空间名称“EP”(是否缺少 using 指令或程序集引用?) F:/Enterprise/control/HyperlinkControl.ascx.cs 15 
错误 3 找不到类型或命名空间名称“EP”(是否缺少 using 指令或程序集引用?) F:/Enterprise/control/MarqueeImage.ascx.cs 16 

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