namespace System.Net.Mail
{
    public class SmtpException : Exception
    {
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId = "SYSLIB0051", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        protected SmtpException(SerializationInfo! serializationInfo, StreamingContext streamingContext);
    }
}