namespace System.Net.Security
{
    public delegate ValueTask<SslServerAuthenticationOptions!> ServerOptionsSelectionCallback(SslStream! stream, SslClientHelloInfo clientHelloInfo, object? state, CancellationToken cancellationToken);
    {
        public virtual IAsyncResult BeginInvoke(SslStream! stream, SslClientHelloInfo clientHelloInfo, object? state, CancellationToken cancellationToken, AsyncCallback callback, object object);
    }
}