<PackageReference Include="System.Security.Cryptography.Cng" Version="5.0.0-preview.5.20278.1" />

System.Security.Cryptography.CngKeyCreationOptions

public enum CngKeyCreationOptions
namespace System.Security.Cryptography { public enum CngKeyCreationOptions { MachineKey = 32, None = 0, OverwriteExistingKey = 128 } }