How to suppress a single warning e.g. CS1591 for all files in a single folder?

e.g I only wont suppress all warnings in folder Areas not in the full project.

I have tried:

<ItemGroup>
  <None Update="AreasIdentityPagesAccount*.cs">
    <NoWarn>CS1591</NoWarn>
  </None>
</ItemGroup>

But it is not working? Are there any solutions.
And i dont wont edit all files in Area with

#pragma warning disable 1591
..
#pragma warning restore 1591