Response.Cookies contains the cookies that will be sent back to the browser. If you want to know whether a cookie exists, you should probably look into Request.Cookies.
Anyway, to see if a cookie exists, you can check **Cookies.Get(string)**. However, if you use this method on the Response object and the cookie doesn't exist, then that cookie will be created.
see given Link For More About Cookie [About Cookie](https://www.w3schools.com/asp/asp_cookies.asp)