protected void Button2_Click(object sender, EventArgs e)
        {
            EMSEntities Context=new EMSEntities();

            EntittyFramewordWebApplication4.StudentDetail stud1=new StudentDetail();
            stud1.id = "67";
            stud1.name = "ziauddin";
            stud1.address = "chittagong";
            stud1.marks = 88;
            stud1.section = "C";
            Context.StudentDetails.Add(stud1);
            Context.SaveChanges();
            Label1.Text = "added";
        }
        protected void Button3_Click(object sender, EventArgs e)
        {
            EMSEntities dbcontext = new EMSEntities();
            EntittyFramewordWebApplication4.StudentDetail stud1 = new StudentDetail();
            try

            {
                string idd = TextBox2.Text;

            stud1 = dbcontext.StudentDetails.FirstOrDefault(xx => xx.id == idd);
            stud1.marks = int.Parse(TextBox6.Text);
            stud1.section = TextBox5.Text;
            dbcontext.SaveChanges();
            Label1.Text = "updated successfull";
            }
            catch(Exception e1)
            {
                Label1.Text = "not found";
            }
        }