private void btn_CreateClass_Click(object sender, EventArgs e) { if (txt_Class.Text != "") { var Class = new SchoolClass(txt_Class.Text); if (Class.CreateClass() == true) { MessageBox.Show("Class Created Sucessfully"); Directory.CreateDirectory("Quiz/" + txt_Class.Text); txt_Class.Text = ""; } } else { MessageBox.Show("Empty! Plz enter class name"); } }