how to execute several urls from database

Question

Hi ....i have a problem that I have more than 1000 urls in my database with a corresponding code in other column.I have to make it execute every url one by one using c# and then get response from every url and set the time for every url to run and give response ......so if url is invalid its code gets stored in some variable. kindly provide me complete code I am a new bee beginner