namespace System.Net
{
    [Obsolete("This API is no longer supported.")]
    public delegate IEnumerable<string> CipherSuitesCallback(SecurityProtocolType protocol, IEnumerable<string> allCiphers);
    {
        public virtual IAsyncResult BeginInvoke(SecurityProtocolType protocol, IEnumerable<string> allCiphers, AsyncCallback callback, object object);
    }
}