Need a code for login and logout functionality using c #. i am using my sql as my database (Urgent)

Question

Hi,


I am learning c#, i am developing an windows mobile application, i want  login and logout functionality (using C# ) for my mobile application.
   
I am developing for windows phone .  i need a code  for this. (Urgent)

Silevrlight for windows phone - windows phone application


some one please help me in this......



  Thanks in Advance.......

 have a good day.....:)