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Aha... Now I understand. Thank you very much.

Well said. : )

Darwen is right. BigJoe, you should listen to Darwen's opinion, as he has a lot of experience.

The key to finally getting this to work for me was the following:

I was successful when I used port number 587.
(For whatever reason, using port 465 did not work for me.)

Also, btw: I was...

OK, fair enough.

It just seems odd, because:
If I use int, it returns a 32-bit value.
If I use short, it returns a 16-bit value.
And if I use sbyte, it returns a 16-bit value, too.

So, for...

This is great code, so I really wanted to try it.

However, when I implement it within a very simple Windows Forms app with a simple Send button, it appears to fail.

"Not responding... ...

Thanks very much for your reply.

However, according to MSDN, there is a method for Convert.ToString(SByte, IFormatProvider), if I am reading this correctly.
...

According to MSDN:
Convert.ToString Method (SByte)
Converts the value of the specified 8-bit signed integer to its equivalent String representation.

So, why does it give 16-bit output?

sbyte x = -4;
Console.WriteLine("Suppose we have an sbyte with value -4.");
Console.WriteLine("The size of sbyte is {0} byte.", sizeof(sbyte));
Console.WriteLine("The sbyte converted to binary...