<PackageReference Include="System.Security.Cryptography.Cng" Version="5.0.0-preview.8.20407.11" />

System.Security.Cryptography.ECDsaCng

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