XML to combobox using C#

Question

How can we upload XML values in combo box, I have searched in net but bit confusing as it was in asp..I need some suggestions.

(MY task: Need to open a URL and from That URL need to take XML File and get the values/record in to combo box)

 

While i am hitting URL writting on click form load my cpu is getting restarted, 

I USed proceesstartinfo  sinfo=new processstartinfo("URL");

process.start(sinfo);