private void btn_AddCourse_Click(object sender, EventArgs e)
 {
     if (textBox_CourseName.Text != "COURSE NAME" && textBox_CreditHour.Text != "CREDIT HOUR")
     {
         mysql.CourseInsert(textBox_CourseName.Text, textBox_CreditHour.Text);
         label_AddCourseMessage.ForeColor = Color.Green;
         label_AddCourseMessage.Text      = "Course Added Successfully";
         label_AddCourseMessage.Show();
     }
     else
     {
         label_AddCourseMessage.ForeColor = Color.Red;
         label_AddCourseMessage.Text      = "Kindly, fill all the fields.";
         label_AddCourseMessage.Show();
     }
 }