system month year bind in drop downlist

Question

Hiiiii , I have some problem in system date time.

i have create a dropdownlist.
<asp:DropDownList ID="ddl_date" runat="server"></asp:DropDownList>

after that  i have create a userdefined method
i want to bind the system month and year in this format in the dropdownlist when the page is load
 format is Oct-13 this is current month
then next month it will bind like Nov-13
 then next month Dec-13
then next Jan-14
 like that . plz give me the complete solution
Thanx