VS2015操作Oracle数据需要做那些设置？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Oracle.DataAccess.Client;//引用的dll
namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {

            string constr = "User Id=Leo;Password=m123;Data Source=orcl";
            OracleConnection con = new OracleConnection(constr);
            con.Open();

            // Display Version Number
            Console.WriteLine("Connected to Oracle " + con.ServerVersion);
            OracleCommand cmmd = new OracleCommand("select * from Leo_Person ", con);
            OracleDataAdapter oa = new OracleDataAdapter(cmmd);
            System.Data.DataSet ds = new System.Data.DataSet();
            oa.Fill(ds, "person");

            foreach (System.Data.DataRow row in ds.Tables[0].Rows)
            {
                int count = 0;
                foreach (System.Data.DataColumn column in ds.Tables[0].Columns)
                {

                    Console.Write(column.ColumnName + ":" + row[column] + "\t");

                    count++;
                }
                if (count == 3)
                {
                    Console.Write("\n");
                }
           
          }
            // Close and Dispose OracleConnection
            con.Close();
            con.Dispose();
            Console.Read();