Merge pull request #357 from MariaSolOs/use-infobar-cookie

Using InfoBar listener cookie

Author: madskristensen

src/toolkit/Community.VisualStudio.Toolkit.Shared/Notifications/InfoBar.cs

@@ -94,6 +94,7 @@ public class InfoBar : IVsInfoBarUIEvents
         private readonly IVsInfoBarHost _host;
         private readonly InfoBarModel _model;
         private IVsInfoBarUIElement? _uiElement;
+        private uint _listenerCookie;
 
         /// <summary>
         /// Creates a new instance of the InfoBar in a specific window frame or document window.
@@ -112,14 +113,14 @@ internal InfoBar(IVsInfoBarHost host, InfoBarModel model)
         /// <summary>
         /// Displays the InfoBar in the tool window or document previously specified.
         /// </summary>
-        /// <returns><c>true</c> if the InfoBar was shown; otherwise <c>false</c>.</returns>
+        /// <returns><see langword="true" /> if the InfoBar was shown; otherwise <see langword="false" />.</returns>
         public async Task<bool> TryShowInfoBarUIAsync()
         {
             await ThreadHelper.JoinableTaskFactory.SwitchToMainThreadAsync();
             IVsInfoBarUIFactory infoBarUIFactory = (IVsInfoBarUIFactory)await VS.GetRequiredServiceAsync<SVsInfoBarUIFactory, object>();
 
             _uiElement = infoBarUIFactory.CreateInfoBar(_model);
-            _uiElement.Advise(this, out _);
+            _uiElement.Advise(this, out _listenerCookie);
 
             if (_host != null)
             {
@@ -131,7 +132,7 @@ public async Task<bool> TryShowInfoBarUIAsync()
         }
 
         /// <summary>
-        /// Attempts to get the underlying WPF UI element of the InfoBar
+        /// Attempts to get the underlying WPF UI element of the InfoBar.
         /// </summary>
         public bool TryGetWpfElement(out Control? control)
         {
@@ -171,6 +172,7 @@ public void Close()
         void IVsInfoBarUIEvents.OnClosed(IVsInfoBarUIElement infoBarUIElement)
         {
             IsVisible = false;
+            _uiElement?.Unadvise(_listenerCookie);
         }
 
         void IVsInfoBarUIEvents.OnActionItemClicked(IVsInfoBarUIElement infoBarUIElement, IVsInfoBarActionItem actionItem)