<PackageReference Include="NETStandard.Library" Version="2.0.0-preview2-25401-01" />

System.Security.Cryptography.DeriveBytes

public abstract class DeriveBytes : IDisposable
namespace System.Security.Cryptography { public abstract class DeriveBytes : IDisposable { protected DeriveBytes(); public void Dispose(); protected virtual void Dispose(bool disposing); public abstract byte[] GetBytes(int cb); public abstract void Reset(); } }