c# – ASPNET 5 MVC 6中的远程验证

我正在尝试实现远程验证演示,似乎Microsoft.AspNet.Mvc不包含JsonRequestBehavior枚举.
但它确实存在于以前版本的MVC中的System.Web.Mvc命名空间中

模型：

public class Person : Entity
    {
        [Required]
        [StringLength(512)]
        [Remote("IsAllowedName","Validation",ErrorMessage="This name is not allowed!"
               )]
        [Display(Name = "First (and middle) name")]
        public String FirstMidName { get; set; }

视图：

...
<input asp-for="FirstMidName"/>
<span asp-validation-for="FirstMidName"></span>
...

控制器：

[HttpGet]
public JsonResult IsAllowedName(string FirstMidName)
{
    if (FirstMidName.ToLower() == "oleg")
    {
        return Json(false,JsonRequestBehavior.AllowGet); 
    }
    return Json(true);
}

终端输出：

MacBook-Air-Anton:labefmvc antonprudkoglyad$dnu build 
...
/Users/antonprudkoglyad/Projects/LabEFMVC/LabEFMVC/Controllers/
ValidationController.cs(20,24):
DNXCore,Version=v5.0 error CS0103: The name 'JsonRequestBehavior'
does not exist in the current context

Build failed.