check if record already exists access

SqlConnection con = new SqlConnection(strConnString);

            SqlCommand cmdCount = new SqlCommand("select count(*) from customers where name='" + txtCustomername.Text + "'", con);

            con.Open();

            int count = (int)cmdCount.ExecuteScalar();

            if (count > 0)

            {

                lblMessage.Text = "Customer already exists";

                lblMessage.Visible = true;

            }

            else

            {

                Insert query

            }

            con.Close();