public class RequestDatabaseFactory
    {
        public static SqlConnection Connection
        {
            get
            {
                if (HttpContext.Current.Items.Contains("RequestDatabaseFactoryConnection"))
                    return HttpContext.Current.Items["RequestDatabaseFactoryConnection"] as SqlConnection;

                return null;
            }
            set
            {
                HttpContext.Current.Items["RequestDatabaseFactoryConnection"] = value;
            }
        }

        public static SqlConnection Get()
        {
            if (null == Connection)
            {
                Connection = new SqlConnection("connStringNameInWebconfig");
                Connection.Open();
            }

            return Connection;
        }

        public static void Close()
        {
            if (Connection != null)
                Connection.Close();
        }

        public static SqlCommand CreateCommand()
        {
            var ret= new SqlCommand();
            ret.Connection = Get();
            return ret;
        }
    }

    public class ComponentA
    {
        public object GetA()
        {
            var myCmd = RequestDatabaseFactory.CreateCommand();
            return null;
        }
    }

    public class ComponentB
    {
        public object GetB()
        {
            var myCmd = RequestDatabaseFactory.CreateCommand();
            return null;
        }
    }

void main()
{
    var ca = new ComponentA();
    var cb = new ComponentB();

    ca.GetA();
    cb.GetB();
}