How IIS server handles multiple requests

Hi

 This could be very basic question but I was so confused so I feel to ask.

 This is more related to any ObjectOriented question.

 Suppose in my page load function I have two line

if(f[i].exists == true)   ///////////       line 1    f[i] is file reference object of file system

f[i].delete();      /////////         line 2

 

Now when I have multiple requsts coming to IIS server which basically simply instantiate neww objects for which it calls page_load individually.

Now Pls consider below scenaro :

 1) Two separate requests are coming to IIS at same time.

  2) How IIS will handle these 2 objects handling ....as a thread or process(I think process)

3) If it handles as processes and suppose for first object code has been executed till lin ...