System.Net.HttpListenerResponse.ComputeCookies C# (CSharp) Method

        internal void ComputeCookies()
        {
            if (NetEventSource.IsEnabled) NetEventSource.Info(this, 
                $"Entering Set-Cookie: {Headers[HttpResponseHeader.SetCookie]}, Set-Cookie2: {Headers[HttpKnownHeaderNames.SetCookie2]}");
            if (_cookies != null)
            {
                // now go through the collection, and concatenate all the cookies in per-variant strings
                string setCookie2 = null;
                string setCookie = null;
                for (int index = 0; index < _cookies.Count; index++)
                {
                    Cookie cookie = _cookies[index];
                    string cookieString = cookie.ToServerString();
                    if (cookieString == null || cookieString.Length == 0)
                    {
                        continue;
                    }
                    if (NetEventSource.IsEnabled) NetEventSource.Info(this, $"Now looking at index:{index} cookie: {cookie}");
                    if (cookie.IsRfc2965Variant())
                    {
                        setCookie2 = setCookie2 == null ? cookieString : setCookie2 + ", " + cookieString;
                    }
                    else
                    {
                        setCookie = setCookie == null ? cookieString : setCookie + ", " + cookieString;
                    }
                }
                if (!string.IsNullOrEmpty(setCookie))
                {
                    Headers.Set(HttpKnownHeaderNames.SetCookie, setCookie);
                    if (string.IsNullOrEmpty(setCookie2))
                    {
                        Headers.Remove(HttpKnownHeaderNames.SetCookie2);
                    }
                }
                if (!string.IsNullOrEmpty(setCookie2))
                {
                    Headers.Set(HttpKnownHeaderNames.SetCookie2, setCookie2);
                    if (string.IsNullOrEmpty(setCookie))
                    {
                        Headers.Remove(HttpKnownHeaderNames.SetCookie);
                    }
                }
            }
            if (NetEventSource.IsEnabled) NetEventSource.Info(this,
                $"Exiting Set-Cookie: {Headers[HttpResponseHeader.SetCookie]} Set-Cookie2: {Headers[HttpKnownHeaderNames.SetCookie2]}");
        }