moved stuff around again. WPF didnt like things once they were moved. Also wired up Join dialog.

windows/WinUI/PeersPage.xaml.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace WinUI
+{
+    /// <summary>
+    /// Interaction logic for PeersPage.xaml
+    /// </summary>
+    public partial class PeersPage : UserControl
+    {
+        private List<ZeroTierPeer> peersList = new List<ZeroTierPeer>();
+
+        public PeersPage()
+        {
+            InitializeComponent();
+
+            dataGrid.ItemsSource = peersList;
+        }
+
+        public void SetPeers(List<ZeroTierPeer> list)
+        {
+            if (list == null)
+                return;
+
+            
+            foreach(ZeroTierPeer p in list)
+            {
+                ZeroTierPeer curPeer = peersList.Find(peer => peer.Equals(p));
+                if (curPeer == null)
+                {
+                    peersList.Add(p);                    
+                }
+                else
+                {
+                    curPeer.Update(p);
+                }
+            }
+
+            dataGrid.Items.Refresh();
+        }
+    }
+}