SaferComputeTokenFromLevel

[DllImport("Advapi32.dll", SetLastError = true)][return: MarshalAs(UnmanagedType.Bool)]
public static extern bool SaferComputeTokenFromLevel(
   IntPtr LevelHandle,
   IntPtr InAccessToken,
   out IntPtr OutAccessToken,
   uint dwFlags,
   IntPtr lpReserved
);

Microsoft documentation: Link