private void AddCourse_Save_Btn_Click(object sender, EventArgs e)
        {
            DisciplineController disc = new DisciplineController();

            bool f = disc.DExists();

            if (f == true)
            {
                String code  = AddCourse_CourseCode_txt.Text;
                String hour  = AddCourse_CreditHours_txt.Text;
                String title = AddCourse_CourseName_txt.Text;


                if (code.Equals("") || hour.Equals("") || title.Equals(""))
                {
                    return;
                }

                if (!AddCourse_Sessional_RadioBtn.Checked && !AddCourse_Theory_RadioBtn.Checked)
                {
                    return;
                }

                bool flag = controller.CExists(code);

                if (flag == false)
                {
                    if (AddCourse_Theory_RadioBtn.Checked)
                    {
                        controller.saveCourse(code, hour, title, "");
                    }
                    if (AddCourse_Sessional_RadioBtn.Checked)
                    {
                        controller.saveCourse(code, hour, title, "yes");
                    }
                    MessageBox.Show("Course Saved");
                    AddCourse_CourseCode_txt.Text  = "";
                    AddCourse_CourseName_txt.Text  = "";
                    AddCourse_CreditHours_txt.Text = "";
                }
                else
                {
                    MessageBox.Show("Course Already Exists");
                }
            }
            else
            {
                MessageBox.Show("You have not created any Discipline yet !!!", "Warning", MessageBoxButtons.OK);
                AddCourse_CourseCode_txt.Text  = "";
                AddCourse_CourseName_txt.Text  = "";
                AddCourse_CreditHours_txt.Text = "";
            }
        }