How to get Current month and year only?

protected void Page_Load(object sender, EventArgs e)
        {
            //Current Month and year from current date
            DateTime a = DateTime.Now;
            Response.Write(DateTime.Now);
            Response.Write(a.Year);
            Response.Write(a.Month);


            //Convert Date to string
            string b = DateTime.Now.ToString("dd-MMM-yyyy");
           

        }

hi...