Merge remote-tracking branch 'dotnet/dev15.6.x' into update-keybinding-text

* dotnet/dev15.6.x:
  Fix symbol completion after 'in' (#24335)
  use PascalCase for const name
  Limit compiler server pipe name length (#24265)
  Test ConvertedType on LHS of deconstruction-assignment (#24158)
  remove unused usings
  use .editorconfig files
  address more comments
  address code review comments
  move newly added text into resource file
  add text and hyperlink to C# code style page

src/Compilers/CSharp/Test/Emit/CodeGen/CodeGenDeconstructTests.cs

@@ -92,6 +92,7 @@ public void Deconstruct(out int a, out string b)
                 var lhs = tree.GetRoot().DescendantNodes().OfType<TupleExpressionSyntax>().First();
                 Assert.Equal(@"(x, y)", lhs.ToString());
                 Assert.Equal("(System.Int64 x, System.String y)", model.GetTypeInfo(lhs).Type.ToTestDisplayString());
+                Assert.Equal("(System.Int64 x, System.String y)", model.GetTypeInfo(lhs).ConvertedType.ToTestDisplayString());
 
                 var right = tree.GetRoot().DescendantNodes().OfType<ObjectCreationExpressionSyntax>().Single();
                 Assert.Equal(@"new C()", right.ToString());
@@ -2392,10 +2393,10 @@ class C
 {
     static void Main()
     {
-        int x;
+        long x;
         string y, z;
 
-        (x, (y, z)) = (1, (""a"", ""b""));
+        (x, (y, z)) = ((int)1, (""a"", ""b""));
         System.Console.WriteLine(x + "" "" + y + "" "" + z);
     }
 }
@@ -2409,7 +2410,8 @@ static void Main()
 
                 var lhs = tree.GetRoot().DescendantNodes().OfType<TupleExpressionSyntax>().First();
                 Assert.Equal(@"(x, (y, z))", lhs.ToString());
-                Assert.Equal("(System.Int32 x, (System.String y, System.String z))", model.GetTypeInfo(lhs).Type.ToTestDisplayString());
+                Assert.Equal("(System.Int64 x, (System.String y, System.String z))", model.GetTypeInfo(lhs).Type.ToTestDisplayString());
+                Assert.Equal("(System.Int64 x, (System.String y, System.String z))", model.GetTypeInfo(lhs).ConvertedType.ToTestDisplayString());
             };
 
             var comp = CompileAndVerify(source, expectedOutput: "1 a b", additionalRefs: new[] { ValueTupleRef, SystemRuntimeFacadeRef }, sourceSymbolValidator: validator);
@@ -2906,11 +2908,13 @@ static void Main()
                 var lhs = tree.GetRoot().DescendantNodes().OfType<TupleExpressionSyntax>().First();
                 Assert.Equal("(var x1, var (x2, x3))", lhs.ToString());
                 Assert.Equal("(System.Int32 x1, (System.Int32 x2, System.String x3))", model.GetTypeInfo(lhs).Type.ToTestDisplayString());
+                Assert.Equal("(System.Int32 x1, (System.Int32 x2, System.String x3))", model.GetTypeInfo(lhs).ConvertedType.ToTestDisplayString());
                 Assert.Null(model.GetSymbolInfo(lhs).Symbol);
 
                 var lhsNested = tree.GetRoot().DescendantNodes().OfType<DeclarationExpressionSyntax>().ElementAt(1);
                 Assert.Equal("var (x2, x3)", lhsNested.ToString());
                 Assert.Equal("(System.Int32 x2, System.String x3)", model.GetTypeInfo(lhsNested).Type.ToTestDisplayString());
+                Assert.Equal("(System.Int32 x2, System.String x3)", model.GetTypeInfo(lhsNested).ConvertedType.ToTestDisplayString());
                 Assert.Null(model.GetSymbolInfo(lhsNested).Symbol);
 
                 var x1 = GetDeconstructionVariable(tree, "x1");
@@ -2954,6 +2958,7 @@ static void Main()
                 var lhs = tree.GetRoot().DescendantNodes().OfType<TupleExpressionSyntax>().First();
                 Assert.Equal("(var x1, byte _, var (x2, x3))", lhs.ToString());
                 Assert.Equal("(System.Int32 x1, System.Byte, (System.Int32 x2, System.String x3))", model.GetTypeInfo(lhs).Type.ToTestDisplayString());
+                Assert.Equal("(System.Int32 x1, System.Byte, (System.Int32 x2, System.String x3))", model.GetTypeInfo(lhs).ConvertedType.ToTestDisplayString());
                 Assert.Null(model.GetSymbolInfo(lhs).Symbol);
 
                 var lhsNested = tree.GetRoot().DescendantNodes().OfType<DeclarationExpressionSyntax>().ElementAt(2);

src/Compilers/Server/VBCSCompilerTests/DesktopBuildClientTests.cs

@@ -371,6 +371,15 @@ public void GetBasePipeNameSlashes()
                 Assert.Equal(name, BuildServerConnection.GetBasePipeName(path + Path.DirectorySeparatorChar));
                 Assert.Equal(name, BuildServerConnection.GetBasePipeName(path + Path.DirectorySeparatorChar + Path.DirectorySeparatorChar));
             }
+
+            [Fact]
+            public void GetBasePipeNameLength()
+            {
+                var path = string.Format(@"q:{0}the{0}path", Path.DirectorySeparatorChar);
+                var name = BuildServerConnection.GetBasePipeName(path);
+                // We only have ~50 total bytes to work with on mac, so the base path must be small
+                Assert.InRange(name.Length, 10, 30);
+            }
         }
     }
 }

src/Compilers/Shared/BuildServerConnection.cs

@@ -544,7 +544,7 @@ internal static string GetPipeNameForPathOpt(string compilerExeDirectory)
                 return null;
             }
 
-            return $"{userName}.{isAdmin}.{basePipeName}";
+            return $"{userName}.{(isAdmin ? 'T' : 'F')}.{basePipeName}";
         }
 
         internal static string GetBasePipeName(string compilerExeDirectory)
@@ -559,6 +559,7 @@ internal static string GetBasePipeName(string compilerExeDirectory)
             {
                 var bytes = sha.ComputeHash(Encoding.UTF8.GetBytes(compilerExeDirectory));
                 basePipeName = Convert.ToBase64String(bytes)
+                    .Substring(0, 25) // We only have ~50 total characters on Mac, so strip this down
                     .Replace("/", "_")
                     .Replace("=", string.Empty);
             }

src/EditorFeatures/CSharpTest/Completion/CompletionProviders/SymbolCompletionProviderTests.cs

@@ -1924,6 +1924,56 @@ void M()
             await VerifyItemExistsAsync(markup, "String");
         }
 
+        [Fact, Trait(Traits.Feature, Traits.Features.Completion)]
+        [WorkItem(24326, "https://github.com/dotnet/roslyn/issues/24326")]
+        public async Task AfterInInLambda()
+        {
+            var markup = @"
+using System;
+class C
+{
+    void M()
+    {
+        Func<int, int> f = (in $$
+    }
+}
+";
+            await VerifyItemExistsAsync(markup, "String");
+        }
+
+        [Fact, Trait(Traits.Feature, Traits.Features.Completion)]
+        [WorkItem(24326, "https://github.com/dotnet/roslyn/issues/24326")]
+        public async Task AfterInInMethodDeclaration()
+        {
+            var markup = @"
+using System;
+class C
+{
+    void M(in $$)
+    {
+    }
+}
+";
+            await VerifyItemExistsAsync(markup, "String");
+        }
+
+        [Fact, Trait(Traits.Feature, Traits.Features.Completion)]
+        [WorkItem(24326, "https://github.com/dotnet/roslyn/issues/24326")]
+        public async Task VariableAfterInInInvocation()
+        {
+            var markup = @"
+using System;
+class C
+{
+    void M(in String parameter)
+    {
+        M(in $$
+    }
+}
+";
+            await VerifyItemExistsAsync(markup, "parameter");
+        }
+
         [WorkItem(539217, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/539217")]
         [Fact, Trait(Traits.Feature, Traits.Features.Completion)]
         public async Task NestedType1()

src/VisualStudio/Core/Def/ServicesVSResources.Designer.cs

@@ -480,6 +480,15 @@ internal class ServicesVSResources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files..
+        /// </summary>
+        internal static string Code_style_header_use_editor_config {
+            get {
+                return ResourceManager.GetString("Code_style_header_use_editor_config", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to prefer auto properties.
         /// </summary>

src/VisualStudio/Core/Def/ServicesVSResources.resx

@@ -1013,4 +1013,7 @@ I agree to all of the foregoing:</value>
     <value>Disabling the extension '{0}' unbound your keyboard bindings.</value>
     <comment>0 is an extension name</comment>
   </data>
-</root>
\ No newline at end of file
+  <data name="Code_style_header_use_editor_config" xml:space="preserve">
+    <value>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</value>
+  </data>
+</root>

src/VisualStudio/Core/Def/xlf/ServicesVSResources.cs.xlf

@@ -1493,6 +1493,11 @@ Souhlasím se všemi výše uvedenými podmínkami:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.de.xlf

@@ -1493,6 +1493,11 @@ Ich stimme allen vorstehenden Bedingungen zu:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.es.xlf

@@ -1493,6 +1493,11 @@ Estoy de acuerdo con todo lo anterior:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.fr.xlf

@@ -1493,6 +1493,11 @@ Je suis d'accord avec tout ce qui précède :</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.it.xlf

@@ -1493,6 +1493,11 @@ L'utente accetta le condizioni sopra riportate:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.ja.xlf

@@ -1493,6 +1493,11 @@ I agree to all of the foregoing:</source>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.ko.xlf

@@ -1493,6 +1493,11 @@ I agree to all of the foregoing:</source>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.pl.xlf

@@ -1493,6 +1493,11 @@ Wyrażam zgodę na wszystkie następujące postanowienia:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.pt-BR.xlf

@@ -1493,6 +1493,11 @@ Eu concordo com todo o conteúdo supracitado:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.ru.xlf

@@ -1493,6 +1493,11 @@ I agree to all of the foregoing:</source>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.tr.xlf

@@ -1493,6 +1493,11 @@ Aşağıdakilerin tümünü onaylıyorum:</target>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.zh-Hans.xlf

@@ -1493,6 +1493,11 @@ I agree to all of the foregoing:</source>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Def/xlf/ServicesVSResources.zh-Hant.xlf

@@ -1493,6 +1493,11 @@ I agree to all of the foregoing:</source>
         <target state="new">Disabling the extension '{0}' unbound your keyboard bindings.</target>
         <note>0 is an extension name</note>
       </trans-unit>
+      <trans-unit id="Code_style_header_use_editor_config">
+        <source>The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</source>
+        <target state="new">The settings configured here only apply to your machine. To configure these settings to travel with your solution, use .editorconfig files.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/VisualStudio/Core/Impl/Options/GridOptionPreviewControl.xaml

@@ -5,7 +5,7 @@
     xmlns:converters="clr-namespace:Microsoft.VisualStudio.LanguageServices.Implementation.Options.Converters"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:options="clr-namespace:Microsoft.VisualStudio.LanguageServices.Implementation.Options"
     xmlns:imaging="clr-namespace:Microsoft.VisualStudio.Imaging;assembly=Microsoft.VisualStudio.Imaging"
@@ -21,9 +21,9 @@
                     <Setter.Value>
                         <Style TargetType="DataGridCell">
                             <Setter Property="BorderThickness" Value="1" />
-                            <Setter Property="IsTabStop" 
-                                    Value="{Binding 
-                                        Path=Column, 
+                            <Setter Property="IsTabStop"
+                                    Value="{Binding
+                                        Path=Column,
                                         Converter={StaticResource ColumnToTabStopConverter},
                                         RelativeSource={RelativeSource Self}}"/>
                         </Style>
@@ -35,12 +35,20 @@
             <converters:MarginConverter x:Key="MarginConverter" />
         </Grid.Resources>
         <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
             <RowDefinition Height="*" />
             <RowDefinition Height="5" />
             <RowDefinition Height="*" />
         </Grid.RowDefinitions>
+        <TextBlock TextWrapping="Wrap">
+            <Run Text="{x:Static local:GridOptionPreviewControl.CodeStylePageHeader}"/>
+            <Run Text=" "/>
+            <Hyperlink RequestNavigate="LearnMoreHyperlink_RequestNavigate" NavigateUri="{x:Static local:GridOptionPreviewControl.CodeStylePageHeaderLearnMoreUri}">
+                <TextBlock Text="{x:Static local:GridOptionPreviewControl.CodeStylePageHeaderLearnMoreText}"/>
+            </Hyperlink>
+        </TextBlock>
         <DataGrid
-            Grid.Row="0"
+            Grid.Row="1"
             x:Uid="CodeStyleContent"
             x:Name="CodeStyleMembers"
             Margin="0,5,0,0"
@@ -88,7 +96,7 @@
             </DataGrid.GroupStyle>
             <DataGrid.Columns>
                 <DataGridTemplateColumn
-                    x:Name="description" 
+                    x:Name="description"
                     Header="{x:Static local:GridOptionPreviewControl.DescriptionHeader}"
                     Width="4.5*"
                     IsReadOnly="True">
@@ -106,8 +114,8 @@
                         </DataTemplate>
                     </DataGridTemplateColumn.CellTemplate>
                 </DataGridTemplateColumn>
-                <DataGridTemplateColumn 
-                    x:Name="preference" 
+                <DataGridTemplateColumn
+                    x:Name="preference"
                     Header="{x:Static local:GridOptionPreviewControl.PreferenceHeader}"
                     Width="3*">
                     <DataGridTemplateColumn.CellTemplate>
@@ -115,7 +123,7 @@
                             <ComboBox
                                     ItemsSource="{Binding Preferences}"
                                     DisplayMemberPath="Name"
-                                    SelectedItem="{Binding SelectedPreference, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
+                                    SelectedItem="{Binding SelectedPreference, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                                     VerticalContentAlignment="Center"
                                     HorizontalContentAlignment="Left">
                                 <ComboBox.ItemContainerStyle>
@@ -127,8 +135,8 @@
                         </DataTemplate>
                     </DataGridTemplateColumn.CellTemplate>
                 </DataGridTemplateColumn>
-                <DataGridTemplateColumn 
-                    x:Name="severity" 
+                <DataGridTemplateColumn
+                    x:Name="severity"
                     Header="{x:Static local:GridOptionPreviewControl.SeverityHeader}"
                     Width="2.5*">
                     <DataGridTemplateColumn.CellTemplate>
@@ -147,12 +155,12 @@
                                                 <ColumnDefinition Width="*"/>
                                             </Grid.ColumnDefinitions>
                                             <imaging:CrispImage
-                                            Height="16" 
-                                            Width="16" 
+                                            Height="16"
+                                            Width="16"
                                             Moniker="{Binding Moniker}"
                                             Grid.Column="0"/>
-                                            <TextBlock 
-                                            Margin="5, 0, 0, 0" 
+                                            <TextBlock
+                                            Margin="5, 0, 0, 0"
                                             Text="{Binding Notification}"
                                             Grid.Column="1"/>
                                         </Grid>
@@ -169,8 +177,8 @@
                 </DataGridTemplateColumn>
             </DataGrid.Columns>
         </DataGrid>
-        <GridSplitter Grid.Row="1" HorizontalAlignment="Stretch"></GridSplitter>
-        <Border Grid.Row="2" BorderBrush="Gray" BorderThickness="1">
+        <GridSplitter Grid.Row="2" HorizontalAlignment="Stretch"></GridSplitter>
+        <Border Grid.Row="3" BorderBrush="Gray" BorderThickness="1">
             <ContentControl Name="EditorControl" Content="{Binding TextViewHost, Mode=OneWay}" Focusable="False"></ContentControl>
         </Border>
     </Grid>

src/VisualStudio/Core/Impl/Options/GridOptionPreviewControl.xaml.cs

@@ -4,23 +4,29 @@
 using System.Linq;
 using System.Windows.Controls;
 using System.Windows.Input;
+using System.Windows.Navigation;
 using Microsoft.CodeAnalysis.Options;
+using Microsoft.VisualStudio.LanguageServices.Implementation.Utilities;
 
 namespace Microsoft.VisualStudio.LanguageServices.Implementation.Options
 {
     internal partial class GridOptionPreviewControl : AbstractOptionPageControl
     {
+        private const string UseEditorConfigUrl = "https://go.microsoft.com/fwlink/?linkid=866541";
         internal AbstractOptionPreviewViewModel ViewModel;
         private readonly IServiceProvider _serviceProvider;
         private readonly Func<OptionSet, IServiceProvider, AbstractOptionPreviewViewModel> _createViewModel;
 
+        public static readonly Uri CodeStylePageHeaderLearnMoreUri = new Uri(UseEditorConfigUrl);
+        public static string CodeStylePageHeader => ServicesVSResources.Code_style_header_use_editor_config;
+        public static string CodeStylePageHeaderLearnMoreText => ServicesVSResources.Learn_more;
         public static string DescriptionHeader => ServicesVSResources.Description;
         public static string PreferenceHeader => ServicesVSResources.Preference;
         public static string SeverityHeader => ServicesVSResources.Severity;
-
-        internal GridOptionPreviewControl(IServiceProvider serviceProvider, 
-            Func<OptionSet, IServiceProvider, 
-            AbstractOptionPreviewViewModel> createViewModel) 
+        
+        internal GridOptionPreviewControl(IServiceProvider serviceProvider,
+            Func<OptionSet, IServiceProvider,
+            AbstractOptionPreviewViewModel> createViewModel)
             : base(serviceProvider)
         {
             InitializeComponent();
@@ -29,6 +35,17 @@ internal partial class GridOptionPreviewControl : AbstractOptionPageControl
             _createViewModel = createViewModel;
         }
 
+        private void LearnMoreHyperlink_RequestNavigate(object sender, RequestNavigateEventArgs e)
+        {
+            if (e.Uri == null)
+            {
+                return;
+            }
+
+            BrowserHelper.StartBrowser(e.Uri);
+            e.Handled = true;
+        }
+
         private void Options_SelectionChanged(object sender, SelectionChangedEventArgs e)
         {
             var dataGrid = (DataGrid)sender;

src/Workspaces/CSharp/Portable/Extensions/ContextQuery/SyntaxTreeExtensions.cs

@@ -1100,6 +1100,7 @@ public static bool IsParameterTypeContext(this SyntaxTree syntaxTree, int positi
 
             if (token.IsKind(SyntaxKind.RefKeyword) ||
                 token.IsKind(SyntaxKind.OutKeyword) ||
+                token.IsKind(SyntaxKind.InKeyword) ||
                 token.IsKind(SyntaxKind.ParamsKeyword) ||
                 token.IsKind(SyntaxKind.ThisKeyword))
             {
@@ -1182,6 +1183,7 @@ public static bool IsParameterTypeContext(this SyntaxTree syntaxTree, int positi
             token = token.GetPreviousTokenIfTouchingWord(position);
 
             if (token.IsKind(SyntaxKind.RefKeyword) ||
+                token.IsKind(SyntaxKind.InKeyword) ||
                 token.IsKind(SyntaxKind.OutKeyword))
             {
                 position = token.SpanStart;
@@ -2175,8 +2177,10 @@ public static bool IsLabelContext(this SyntaxTree syntaxTree, int position, Canc
             }
 
             // Goo(ref |
-            // Goo(bar |
+            // Goo(in |
+            // Goo(out |
             if (token.IsKind(SyntaxKind.RefKeyword) ||
+                token.IsKind(SyntaxKind.InKeyword) ||
                 token.IsKind(SyntaxKind.OutKeyword))
             {
                 if (token.Parent.IsKind(SyntaxKind.Argument))