TestLectureInfo.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 TestLectureInfo : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        //var test = Extra_Lecture.GetExtraInfo(2);
       // Response.Write(test);
    }
}