When i want to attache a process Id with the w3wp.exe to my solution in visual studio and debug my web part in sharepoint I have more than one w3wp.exe process . How can I find the correct process id of my sitecollection and attach my solution to that.
Open Command Prompt and Run following command
"appcmd list wps"
It wil gives you all app pool with id.
(appcmd.exe can be found in %windir%\system32\inetsrv)