Enter button creates sound when opening messagebox

[funadventuresawait]

Tried several ways, can't figure out how to disable the 'ding' sound. I know this is basic, but I really can't figure it out. Any advice is greatly appreciated





This is my button press event.

private void txtResult_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                

                if (!String.IsNullOrEmpty(txtResult.Text))
                {
                    btnCheckAnswer.PerformClick();
                    e.SuppressKeyPress = true;
                    e.Handled = true;
                }
               
            }


        }



This is one of the btnCheckAnswer.PerformClick() actions
            }
                    }

                }

                else
                {
                    numRight++;
                    MessageBox.Show("Smarty Pants, You're Right!!");
                    NextQuestion();
                    IncreaseScore();
                }
                return;

            }

        }