<PackageReference Include="System.Security.Cryptography.Cng" Version="5.0.0" />

System.Security.Cryptography.CngKeyUsages

public enum CngKeyUsages
Specifies the cryptographic operations that a Cryptography Next Generation (CNG) key may be used with.
namespace System.Security.Cryptography { public enum CngKeyUsages { None = 0, Decryption = 1, Signing = 2, KeyAgreement = 4, AllUsages = 16777215 } }