Visual studio 2015le oracle db bağlantısı

Oracle Developer Tools for Visual Studio 2015 indir http://www.oracle.com/technetwork/developer-tools/visual-studio/overview/index.html

kur  ve kodlar
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;

using System.Windows.Forms;
using System.IO;
using Oracle.ManagedDataAccess;
using Oracle.ManagedDataAccess.Client;

namespace OracleTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        string oradb;
        private void Form1_Load(object sender, EventArgs e)
        {
       //bağlantı
            StreamReader sr = new StreamReader("dbConnect.txt");
            oradb = sr.ReadLine();
            sr.Close();


        }

        private void button1_Click(object sender, EventArgs e)
        {

            OracleConnection conn = new OracleConnection(oradb);
            conn.Open();
            StreamReader sr = new StreamReader("sql1.txt");
            string sql1 = sr.ReadLine();
            sr.Close();

            OracleCommand cmd = new OracleCommand();
            cmd.Connection = conn;
            cmd.CommandText = sql1;
            cmd.CommandType = CommandType.Text;
            OracleDataAdapter da = new OracleDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds, "ss");
            gridControl1.DataSource = ds.Tables["ss"];
            //OracleDataReader dr = cmd.ExecuteReader();
            //dataGridView1.DataSource = dr;

            //while (dr.Read())
            //{
            //    listBox1.Items.Add(dr.GetString(2));
            //}
            //conn.Dispose();

        }
    }
}

dbconnect.txt

Data Source=ORCL;User Id=hr;Password=hr;