<PackageReference Include="System.Security.Principal.Windows" Version="5.0.0-preview.2.20160.6" />

WindowsPrincipal

using System.Security.Claims; namespace System.Security.Principal { public class WindowsPrincipal : ClaimsPrincipal { public override IIdentity Identity { get { throw new PlatformNotSupportedException(); } } public WindowsPrincipal(WindowsIdentity ntIdentity) { throw new PlatformNotSupportedException(); } public virtual bool IsInRole(int rid) { throw new PlatformNotSupportedException(); } public virtual bool IsInRole(SecurityIdentifier sid) { throw new PlatformNotSupportedException(); } public virtual bool IsInRole(WindowsBuiltInRole role) { throw new PlatformNotSupportedException(); } public override bool IsInRole(string role) { throw new PlatformNotSupportedException(); } } }