Hello all, I needed your mastery advice again. The excercise: Using the Switch statement to write a method that converts the integers 1, 2, 3 and 4 into the words: Diamonds, Hearts, clubs and spades respectively. Form design consist of: - label text (Suit No.) - Text box - Button (Convert) My codes for above as follow: HTML: private void button1_Click(object sender, EventArgs e) { int s; s = Convert.ToInt32(textBox3.Text); if (s < 1 || s > 4) { MessageBox.Show("Please enter a number between 1 and 4"); } string CovertSuit; switch (s) { case 1: CovertSuit = "Diamond"; MessageBox.Show(CovertSuit); break; case 2: CovertSuit = "Heart"; MessageBox.Show(CovertSuit); break; case 3: CovertSuit = "Club"; MessageBox.Show(CovertSuit); break; case 4: CovertSuit = "Spade"; MessageBox.Show(CovertSuit); } } Receiving the following error when program executed: Error 1 Control cannot fall through from one case label ('case 4:') to another Please help to point out what I did wrong here Thank you so much