HI i am getting error on lbl.Visible = true and command.ExecuteNonQuery();

plz check and paste correct coding i doing new project plz help me.

  protected void Button1_Click1(object sender, EventArgs e)
        {
            SqlConnection conn = new SqlConnection("Data Source=RAVI-PCSQLEXPRESS;Initial Catalog=personals;User ID=sa;password=sa;Integrated Security=True");
            SqlDataAdapter da = new SqlDataAdapter(" select * from table_2", conn);
            DataSet ds = new DataSet();
            da.Fill(ds, "table_1");

            conn.Open(); 

            SqlCommand command = new SqlCommand();

            command.CommandText = ("insert into table_1 (id,name,address,phone,city)values(@id,@name,@address,@phone,@city");
            command.Parameters.Add("@id", SqlDbType.VarChar, 50);
            command.Parameters.Add("@name", SqlDbType.VarChar, 50);
            command.Parameters.Add("@address", SqlDbType.VarChar, 50);
            command.Parameters.Add("@phone", SqlDbType.VarChar, 50);
            command.Parameters.Add("@city", SqlDbType.VarChar, 50);

            command.Parameters["@id"].Value = TextBox1.Text;
            command.Parameters["@name"].Value = TextBox2.Text;
            command.Parameters["@address"].Value = TextBox3.Text;
            command.Parameters["@phone"].Value = TextBox4.Text;
            command.Parameters["@city"].Value = TextBox5.Text;

            lbl.Visible = true;

            command.ExecuteNonQuery();
             conn.Close();

        }