updated and connected webview to C#

RelayClient/MainPage.xaml.cs

@@ -40,6 +40,7 @@ public partial class MainPage : ContentPage
         _wsc.Send($"REGISTER_KEY|{_username}|{publicKey}");
         _wsc.Send("GET_SERVER_KEY");
         _wsc.Send("GET_CHANNELS");
+        hybridWebView.SetInvokeJavaScriptTarget(this);
 
     }
 
@@ -305,4 +306,72 @@ public partial class MainPage : ContentPage
             ViewSwapped.Text = "Swap to Web View";
         }
     }
+    
+    private void OnSendMessageButtonClicked(object sender, EventArgs e)
+    {
+        hybridWebView.SendRawMessage($"Hello from C#!");
+    }
+
+    private async void OnHybridWebViewRawMessageReceived(object sender, HybridWebViewRawMessageReceivedEventArgs e)
+    {
+        await DisplayAlertAsync("Raw Message Received", e.Message, "OK");
+    }
+
+    #region syncs
+    public async void DoSyncWork()
+    {
+        await DisplayAlertAsync("Sync Work", "Sync Work", "OK");
+    }
+
+    public async void DoSyncWorkParams(int i, string s)
+    {
+        await DisplayAlertAsync("Sync Work", $"{i}:{s}", "OK");
+    }
+
+    public string DoSyncWorkReturn()
+    {
+        return "Hello from C#!";
+    }
+
+    public SyncReturn DoSyncWorkParamsReturn(int i, string s)
+    {
+        return new SyncReturn
+        {
+            Message = $"Hello from C#!  {s}",
+            Value = i
+        };
+    }
+    #endregion
+    
+    #region asyncs
+
+    public async Task DoAsyncWork()
+    {
+        await Task.Delay(1000);
+    }
+    public async Task DoAsyncWorkParams(int i, string s)
+    {
+        await DisplayAlertAsync("Sync Work", $"{i}:{s}", "OK");
+    }
+    public async Task<string> DoAsyncWorkReturn()
+    {
+        return "Hello from C#!";
+    }
+
+    public async Task<SyncReturn> DoAsyncWorkParamsReturn(int i, string s)
+    {
+        await Task.Delay(1000);
+        return new SyncReturn
+        {
+            Message = $"Hello from C# ASync!  {s}",
+            Value = i
+        };
+    }
+
+    #endregion
+    public class SyncReturn
+    {
+        public string? Message { get; set; }
+        public int Value { get; set; }
+    }
 }