CookieCollection cookies = new CookieCollection(); Cookie cookie = new Cookie("username", "johndoe"); cookies.Add(cookie);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://example.com"); request.CookieContainer = new CookieContainer(); request.CookieContainer.Add(new Cookie("session_id", "12345"));In this example, an HttpWebRequest object is created and a new CookieContainer object is assigned to its CookieContainer property. A new Cookie object with the name "session_id" and value "12345" is added to the container using the Add method. This code is using the System.Net package library.