設定cookie

var cookieManager = CefSharp.Cef.GetGlobalCookieManager();  
await cookieManager.SetCookieAsync("http://" + domain, new CefSharp.Cookie(  
{  
    Domain = domain,  
    Name = name,  
    Value = value,  
    Expires = DateTime.MinValue  
});

讀取cookie 
建立Cookie讀取物件，繼承介面 ICookieVisitor

 
 
public class CookieVisitor : CefSharp.ICookieVisitor  
    {  
        public event Action<CefSharp.Cookie> SendCookie;  
        public bool Visit(CefSharp.Cookie cookie, int count, int total, ref bool deleteCookie)  
        {  
            deleteCookie = false;  
            if (SendCookie != null
 
)  
            {  
                SendCookie(cookie);  
            }  

            return true;  
        }  
    }  
    /// 回撥事件
    private void visitor_SendCookie(CefSharp.Cookie obj)  
    {  
        cookies += obj.Domain.TrimStart('.') + "^" + obj.Name + "^" + obj.Value + "$";  
    }  
 

載入指定頁面的cookie資訊

 /// <summary>
        /// html頁面載入完成
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        async void webBrowser_FrameLoadEnd(object sender, FrameLoadEndEventArgs e)
        {
            string _url = e.Url;
            //判斷是否是需要獲取cookie的頁面
            if(_url.Contains("你頁面的url連線地址")){
                  //註冊獲取cookie回撥事件
                 CookieVisitor visitor = new CookieVisitor();
                 visitor.SendCookie += visitor_SycmCookie;
            }
        }