Add the files

Example/ImportContacts.cs

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+using System;
+using System.IO;
+using System.Xml;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+using MSNPSharp;
+
+namespace MSNPSharpClient
+{
+    public partial class ImportContacts : Form
+    {
+        public ImportContacts()
+        {
+            InitializeComponent();
+        }
+
+
+        private string invitationMessage = String.Empty;
+        public string InvitationMessage
+        {
+            get
+            {
+                return invitationMessage;
+            }
+        }
+
+        private List<string> _contacts = new List<string>();
+        public List<string> Contacts
+        {
+            get
+            {
+                return _contacts;
+            }
+        }
+
+        private void browseFile_Click(object sender, EventArgs e)
+        {
+            if (DialogResult.OK == openFileDialog.ShowDialog(this))
+            {
+                Contacts.Clear();
+                invitationMessage = txtInvitation.Text;
+                try
+                {
+                    XmlDocument doc = new XmlDocument();
+                    doc.LoadXml(File.ReadAllText(openFileDialog.FileName));
+
+                    XmlNodeList contacts = doc.GetElementsByTagName("contact");
+                    foreach (XmlNode contactNode in contacts)
+                    {
+                        if (ClientType.PassportMember == (ClientType)Convert.ToInt32(contactNode.Attributes["type"].Value))
+                        {
+                            Contacts.Add(contactNode.InnerText.ToLower(System.Globalization.CultureInfo.InvariantCulture));
+                        }
+                    }
+                }
+                catch (Exception ex)
+                {
+                    MessageBox.Show(ex.Message);
+                }
+                MessageBox.Show(Contacts.Count.ToString() + " contacts to be imported.");
+            }
+        }
+
+        private void button_Click(object sender, EventArgs e)
+        {
+            Close();
+        }
+    }
+}