Fix scope blocks within switch section.

src/EditorFeatures/CSharp/QuickInfo/SyntacticQuickInfoProvider.cs

 // Copyright (c) Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
 
+using System;
 using System.Collections.Generic;
 using System.ComponentModel.Composition;
 using System.Linq;
@@ -65,7 +66,7 @@ internal class SyntacticQuickInfoProvider : AbstractQuickInfoProvider
 
             // If the parent is a scope block, check and include nearby comments around the open brace
             // LeadingTrivia is preferred
-            if (parent.IsKind(SyntaxKind.Block) && (parent.Parent.IsKind(SyntaxKind.Block) || parent.Parent.IsKind(SyntaxKind.GlobalStatement)))
+            if (IsScopeBlock(parent))
             {
                 MarkInterestedSpanNearbyScopeBlock(parent, openBrace, ref spanStart, ref spanEnd);
             }
@@ -89,6 +90,16 @@ internal class SyntacticQuickInfoProvider : AbstractQuickInfoProvider
             return this.CreateElisionBufferDeferredContent(span);
         }
 
+        private static bool IsScopeBlock(SyntaxNode node)
+        {
+            var parent = node.Parent;
+            return node.IsKind(SyntaxKind.Block)
+                && (parent.IsKind(SyntaxKind.Block)
+                    || parent.IsKind(SyntaxKind.SwitchSection)
+                    || parent.IsKind(SyntaxKind.GlobalStatement
+                    ));
+        }
+
         private static void MarkInterestedSpanNearbyScopeBlock(SyntaxNode block, SyntaxToken openBrace, ref int spanStart, ref int spanEnd)
         {
             SyntaxTrivia nearbyComment;

src/EditorFeatures/CSharpTest/QuickInfo/SyntacticQuickInfoSourceTests.cs

@@ -39,19 +39,19 @@ public void Brackets_0()
         [WpfFact, Trait(Traits.Feature, Traits.Features.QuickInfo)]
         public void Brackets_1()
         {
-            TestInClass("int Property { get; }$$", "int Property {");
+            TestInClass("int Property { get; }$$ ", "int Property {");
         }
 
         [WpfFact, Trait(Traits.Feature, Traits.Features.QuickInfo)]
         public void Brackets_2()
         {
-            TestInClass("void M()\r\n{ }$$", "void M()\r\n{");
+            TestInClass("void M()\r\n{ }$$ ", "void M()\r\n{");
         }
 
         [WpfFact, Trait(Traits.Feature, Traits.Features.QuickInfo)]
         public void Brackets_3()
         {
-            TestInMethodAndScript("var a = new int[] { }$$", "new int[] {");
+            TestInMethodAndScript("var a = new int[] { }$$ ", "new int[] {");
         }
 
         [WpfFact, Trait(Traits.Feature, Traits.Features.QuickInfo)]
@@ -173,7 +173,7 @@ public void ScopeBrackets_5()
         public void ScopeBrackets_6()
         {
             TestInMethodAndScript(@"
-            for (;;;)
+            for (;;)
             {
                 /*************/
 
@@ -255,6 +255,24 @@ int Property
             "{");
         }
 
+        [WorkItem(325, "https://github.com/dotnet/roslyn/issues/325")]
+        [WpfFact, Trait(Traits.Feature, Traits.Features.QuickInfo)]
+        public void ScopeBrackets_10()
+        {
+            TestInMethodAndScript(@"
+            switch (true)
+            {
+                default:
+                    // comment
+                    {
+                    }$$
+                    break;
+            }
+",
+@"// comment
+{");
+        }
+
         private IQuickInfoProvider CreateProvider(TestWorkspace workspace)
         {
             return new SyntacticQuickInfoProvider(