C#

// === .Net Framework ===

HttpCookie myCookie = new HttpCookie("UserSettings");
myCookie["CreditCardNumber"] = "1234 1234 1234 1234"; // Sensitive; sensitive data stored
myCookie.Values["password"] = "5678"; // Sensitive
myCookie.Value = "mysecret"; // Sensitive
...
Response.Cookies.Add(myCookie);


// === .Net Core ===

Response.Headers.Add("Set-Cookie", ...); // Sensitive
Response.Cookies.Append("mykey", "myValue"); // Sensitive