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

System.Security.Cryptography.RSACng

public sealed class RSACng : RSA
Provides a Cryptography Next Generation (CNG) implementation of the RSA algorithm.
namespace System.Security.Cryptography { public sealed class RSACng : RSA { public CngKey Key { get; } public RSACng(); public RSACng(int keySize); public RSACng(CngKey key); } }