public void WriteUtf8String()
{
	// prepare a stream to write objects to
	using (var ms = new MemoryStream())
	{
		// prepare what to write
		var asn1Obj = new Asn1Utf8String("Hello World of ASN.1");
		new DerWriter(ms).Write(asn1Obj);
		
		// that's it. Now use the stream as you like.
	}
}