通过SID Works C＃，按组名称查找的主体IsInRole失败

Question

我很惊讶我无法通过组名查找Windows组成员身份。

我可以用     UserPrincipal.Current.GetGroups（）; 但我显然不能使用     Httpcontext.CurrentUser.IsInRole

按名称查找组成员资格，以确定当前用户是否在组中。

  var groups = UserPrincipal.Current.GetGroups();

  var groupNames = groups.Select(x => x.SamAccountName);
  var check0 = groupNames.Contains("pgXbCreateScanDefn"); //works but is not the way by supporting classes currently check.

  //this is how my supporting classes expect to check membership
  var principal = HttpContext.Current.User;
  var check = principal.IsInRole("pgXbCreateScanDefn");   //expected to be true but is not

  //while this works, I would have to translate the user friendly names to SIDs. 
  var check2 = principal.IsInRole("S-1-5-21-4052565669-1266607236-977642746-1013");  //is true as expected, 

过去我能做到这一点。这不再受支持了吗？