1､设置cookie

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

2､读取cookie

1) 创建Cookie读取对象，继承接口 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;  
        }  
    }  

2) 在browser事件中进行处理

private void browser_FrameLoadEnd(object sender, CefSharp.FrameLoadEndEventArgs e)  
{  
    var cookieManager = CefSharp.Cef.GetGlobalCookieManager();  
    CookieVisitor visitor = new CookieVisitor();  
    visitor.SendCookie += visitor_SendCookie;  
    cookieManager.VisitAllCookies(visitor);  
}  
/// 回调事件
private void visitor_SendCookie(CefSharp.Cookie obj)  
{  
    cookies += obj.Domain.TrimStart('.') + "^" + obj.Name + "^" + obj.Value + "$";  
}  

相关文档：

https://github.com/cefsharp/CefSharp/wiki/Quick-Start

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