Is there a way to spoof a web request from C# code so it doesn't look like a bot or spam hitting the site? I am trying to web scrape my website, but keep getting blocked after a certain amount of calls. I want to act like a real browser. I am using this code, from HTML Agility Pack.
var web = new HtmlWeb();
web.UserAgent =
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11";
Use a regular browser and fiddler (if the developer tools are not up to scratch) and take a look at the request and response headers.
Build up your requests and request headers to match what the browser sends (you can use a couple of different browsers to asses if this makes a difference).
In regards to "getting blocked after a certain amount of calls" - throttle your calls. Only make one call every x seconds. Behave nicely to the site and it will behave nicely to you.
Chances are good that they simply look at the number of calls from your IP address per second and if it passes a threshold, the IP address gets blocked.