C# 创建COOKIE

后台添加 

HttpCookie newCookie = new HttpCookie("User");

 newCookie.Values.Add("Name", olduser.UserNum);
 newCookie.Expires = DateTime.Now.AddDays(30);

 Response.AppendCookie(newCookie);

后台删除

HttpCookie newCookie = new HttpCookie("User");
newCookie.Values.Add("Name", "");
newCookie.Expires = DateTime.Now.AddDays(-1);

Response.AppendCookie(newCookie);

前台读取

@if (@Request.Cookies["User"] == null)

@Request.Cookies["User"].Values["Name"]