Error execute reader

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Data.OleDb;
using System.Data.Common;


SqlConnection SqlConn= new
SqlConnection("server=(local);Database½CentroDatos;uid=sa");

SqlCommand Sqlcom = new SqlCommand("select * from departamento
",SqlConn);
SqlConn.Open();
SqlDataReader myReader= SqlCom.ExecuteReader(); // AQUI ME MARCA ERROR

EN SQLCOM ME DICE QUE FALTA UNA DIRECTIVA USING SIENDO QUE LAS TENGO
ARRIBA

while (myReader.Read())
{
Console.WriteLine(myReader.GetValue(0));
}

Console.WriteLine("Pulsar una tecla ");
Console.ReadLine();
myReader.Close();
SqlConn.Close();