c# - 无法将类型“System.Web.Security.MembershipProvider”隐式转换为 Telerik.Sitefinity.Security.Data.MembershipDataProvider

Question

我是 sitefinity 和 MVC 的新手，我有以下代码：-

MembershipDataProvider membership;

if (HttpContext.Request != null && HttpContext.Request.UrlReferrer != null &&
    HttpContext.Request.UrlReferrer.Authority != null &&
    HttpContext.Request.UrlReferrer.Authority.Equals(businessprovider.GetValueByKey(SitefinityURI)))
{
  **membership = Membership.Providers[Constants.CredentialServiceMembershipProvider];**

}

我正在使用 Sitefinity 会员资格提供程序并尝试获取 sitefinity 会员资格提供程序的集合，但我收到以下错误

无法将类型“System.Web.Security.MembershipProvider”隐式转换为 Telerik.Sitefinity.Security.Data.MembershipDataProvider。