How to display the number row records in sql to textbox?

Question

this my code ;

 Thank you

public MainDashboar_C()
        {
            InitializeComponent();
        }
        SqlConnection conn = new SqlConnection(@"Data Source=AM-PC\SQLEXPRESS;Initial Catalog=Management_Gudang;Integrated Security=True");
        public SqlDataReader READER;

        private void Tampikan_Label()
        {
            conn.Open();
            SqlCommand CMD = new SqlCommand("Select COUNT(*) From Stok_Barang ", conn);
            READER = CMD.ExecuteReader();
            if (READER.HasRows)
            {
                txt_BarangMasuk.Text = READER.ToString();
            }
            Else
            {
              txt_BarangMasuk.Text = "0";
            }
        }