<PackageReference Include="System.Security.Cryptography.Cng" Version="5.0.0-rc.2.20475.5" />

System.Security.Cryptography.RSACng

public sealed class RSACng : RSA
namespace System.Security.Cryptography { public sealed class RSACng : RSA { public CngKey Key { get; } public RSACng(); public RSACng(int keySize); public RSACng(CngKey key); } }