initial commit.

not working

MailAddressVisualizer/MailAddressDebuggerVisualizerProvider .cs

@@ -0,0 +1,24 @@
+using MailAddressVisualizerSource;
+using Microsoft.VisualStudio.Extensibility.DebuggerVisualizers;
+using Microsoft.VisualStudio.RpcContracts.RemoteUI;
+using System.Net.Mail;
+using System.Threading;
+using System.Threading.Tasks;
+namespace MailAddressVisualizer;
+
+internal class MailAddressDebuggerVisualizerProvider : DebuggerVisualizerProvider
+{
+    public override DebuggerVisualizerProviderConfiguration DebuggerVisualizerProviderConfiguration
+        => new("Mail Address Visualizer", typeof(MailAddress));
+
+    public override async Task<IRemoteUserControl> CreateVisualizerAsync(
+    VisualizerTarget visualizerTarget, CancellationToken cancellationToken)
+    {
+        MailAddressModel? model = await visualizerTarget
+            .ObjectSource
+            .RequestDataAsync<MailAddressModel?>(jsonSerializer: null, CancellationToken.None);
+
+        return await Task.FromResult<IRemoteUserControl>(
+            new MailAddressVisualizerUserControl(model));
+    }
+}