Define tooltip in XAML with 10min duration/drop shadow

Author: jcansdale

src/GitHub.InlineReviews/Tags/ShowInlineCommentGlyph.xaml

@@ -3,7 +3,11 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
-             mc:Ignorable="d">
+             mc:Ignorable="d"
+             ToolTipService.ShowDuration="600000" ToolTipService.HasDropShadow="True">
+    <UserControl.ToolTip>
+        <ToolTip x:Name="CommentToolTip" />
+    </UserControl.ToolTip>
     <Viewbox>
         <Path Stroke="Black"
           Data="M13 2H1c-0.55 0-1 0.45-1 1v8c0 0.55 0.45 1 1 1h2v3.5l3.5-3.5h6.5c0.55 0 1-0.45 1-1V3c0-0.55-0.45-1-1-1z m0 9H6L4 13V11H1V3h12v8z"/>

src/GitHub.InlineReviews/Tags/ShowInlineCommentGlyph.xaml.cs

@@ -7,14 +7,9 @@ namespace GitHub.InlineReviews.Tags
 {
     public partial class ShowInlineCommentGlyph : UserControl
     {
-        readonly ToolTip toolTip;
-
         public ShowInlineCommentGlyph()
         {
             InitializeComponent();
-
-            toolTip = new ToolTip();
-            ToolTip = toolTip;
         }
 
         protected override void OnToolTipOpening(ToolTipEventArgs e)
@@ -31,12 +26,12 @@ protected override void OnToolTipOpening(ToolTipEventArgs e)
             var view = new CommentTooltipView();
             view.DataContext = viewModel;
 
-            toolTip.Content = view;
+            CommentToolTip.Content = view;
         }
 
         protected override void OnToolTipClosing(ToolTipEventArgs e)
         {
-            toolTip.Content = null;
+            CommentToolTip.Content = null;
         }
     }
 }