C#

private void ShowPath_Click(object sender, EventArgs e)
        {
            reader = new XmlTextReader("path.xml");
            Form1 f = new Form1();
            String sp="";
            while (reader.Read())
            {
                switch (reader.NodeType)
                {
                    case XmlNodeType.Text: //Display the text in each element.
                        //   Console.WriteLine(reader.Value);
                        String s1;
                        s1 = reader.Value;

                        String ss = listBox1.SelectedItem.ToString();
                        String sss = ss + s1;
                        object o3 = (object)sss;
                        //String s = (string)o3;
                       // listBox2.Items.Add(o3);

                       DirectoryInfo dire = new DirectoryInfo(sss);
                        if (dire.Exists)
                        {
                            String[] folder;
                            folder = Directory.GetDirectories(sss);
                            foreach (string foldername in folder)
                            {
                                FileInfo fil = new FileInfo(foldername);
                               // listBox2.Items.Add(fil.ToString());
                               
                                sp =fil.ToString();
                               
                            }
                        }

                        DirectoryInfo di = new DirectoryInfo(sp);
                        if (di.Exists)
                        {
                            String[] files;
                            files = Directory.GetFiles(sp);
                            foreach (String filename in files)
                            {
                                FileInfo fil2 = new FileInfo(filename);
                                listBox2.Items.Add(fil2.ToString());
                            }
                        }
                        break;

                }
            }
        }

DirectoryInfo dire = new DirectoryInfo(sss);
                        if (dire.Exists)
                        {
                            String[] folder;
                            folder = Directory.GetDirectories(sss);
                            foreach (string foldername in folder)
                            {
                                FileInfo fil = new FileInfo(foldername);
                               // listBox2.Items.Add(fil.ToString());
                               
                                [b]sp =fil.ToString();[/b]
                               
                            }

listBox2.Items.Add(fil.ToString()); 

Web service server side code

        [WebMethod]
        public byte[] HelloWorld2()
        {
            return utf8encodedbytes;
        }

SOAP response

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <HelloWorld2Response xmlns="http://tempuri.org/">
      <HelloWorld2Result>base64Binary</HelloWorld2Result>
    </HelloWorld2Response>
  </soap:Body>
</soap:Envelope>

related type in WSDL

xsd:base64Binary

// Form1 bits
public class Form1
{
	private System.Windows.Forms.TextBox txtMainMessage;  // message area i want to write to. I tried as public modifier as well
	public Form1()
 	{
		// init components 
		// more house keeping
	}
        // This is public accessor I wish to access from form2
        // to write to txtMainMessage textbox. Apparently best practice
	public string WriteMainMessage
	{
		set
		{
			this.txtMainMessage.Text = value;
			MessageBox.Show("from set " + this.txtMainMessage.Text);  // This will display "from set This is accessor"
			this.txtMainMessage.Refresh();
		}
		get
		{
			return this.txtMainMessage.Text;
		}
         }
	button_click(args..)
	{
		//load form2
	}
}
// Here is Form2 part
public class Form2
{
 	private Form1 frm; // set member for form1 object. Tried as public as well
 	public Form2()
	{
		 // init components and stuff
 		frm = new Form1();   //instantiate our Form1 obj
	}
	button_click(args...)	// user event to generate message
	{
		frm.WriteMainMessage = "This is accessor";	// in vstudio drop down list shows WriteMainMessage as a property of Form1 frm
		MessageBox.Show("accessor says " + frm.WriteMainMessage);	// accessing get, displays "accessor says This is accessor"
	}
}