<PackageReference Include="System.Security.Principal.Windows" Version="5.0.0-rc.1.20451.14" />

Microsoft.Win32.SafeHandles.SafeAccessTokenHandle

public sealed class SafeAccessTokenHandle : SafeHandle
Provides a safe handle to a Windows thread or process access token. For more information, see Access Tokens.
namespace Microsoft.Win32.SafeHandles { public sealed class SafeAccessTokenHandle : SafeHandle { public static SafeAccessTokenHandle InvalidHandle { get; } public SafeAccessTokenHandle(IntPtr handle); } }