create connection class in C#(windows application:vs2008)

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;

namespace BrowseUrl
{
class globalconn
{

SqlDataAdapter adp = new SqlDataAdapter();
SqlCommand cmd=new SqlCommand();
SqlDataAdapter sda = new SqlDataAdapter();

public static SqlConnection GetConnection()
{
string constr = "Data Source=XXX.XX.XXX.XXX;Initial Catalog=mydb;User ID=xyz;Password=123456789";
SqlConnection conn = new SqlConnection(constr);
conn.Open();
return conn;
}


}
}