diff --git a/src/EditorFeatures/CSharp/Formatting/CSharpEditorFormattingService.cs b/src/EditorFeatures/CSharp/Formatting/CSharpEditorFormattingService.cs
index 4f07d25d9e92c..afe6e1208173c 100644
--- a/src/EditorFeatures/CSharp/Formatting/CSharpEditorFormattingService.cs
+++ b/src/EditorFeatures/CSharp/Formatting/CSharpEditorFormattingService.cs
@@ -12,12 +12,12 @@
 using Microsoft.CodeAnalysis.CSharp.Utilities;
 using Microsoft.CodeAnalysis.Editor.CSharp.Formatting.Indentation;
 using Microsoft.CodeAnalysis.Editor.Implementation.Formatting.Indentation;
-using Microsoft.CodeAnalysis.Editor.Options;
 using Microsoft.CodeAnalysis.Editor.Shared.Options;
 using Microsoft.CodeAnalysis.Editor.Shared.Utilities;
 using Microsoft.CodeAnalysis.Formatting;
 using Microsoft.CodeAnalysis.Formatting.Rules;
 using Microsoft.CodeAnalysis.Host.Mef;
+using Microsoft.CodeAnalysis.LanguageServices;
 using Microsoft.CodeAnalysis.Options;
 using Microsoft.CodeAnalysis.Shared.Extensions;
 using Microsoft.CodeAnalysis.Text;
@@ -159,6 +159,12 @@ public async Task<IList<TextChange>> GetFormattingChangesAsync(Document document
                 return null;
             }
 
+            var service = document.GetLanguageService<ISyntaxFactsService>();
+            if (service != null && service.IsInNonUserCode(token.SyntaxTree, caretPosition, cancellationToken))
+            {
+                return null;
+            }
+
             // Check to see if the token is ')' and also the parent is a using statement. If not, bail
             if (TokenShouldNotFormatOnTypeChar(token))
             {
diff --git a/src/EditorFeatures/CSharpTest/Formatting/FormattingEngineTests.cs b/src/EditorFeatures/CSharpTest/Formatting/FormattingEngineTests.cs
index d0b6c2af5a63a..db38b393969e3 100644
--- a/src/EditorFeatures/CSharpTest/Formatting/FormattingEngineTests.cs
+++ b/src/EditorFeatures/CSharpTest/Formatting/FormattingEngineTests.cs
@@ -481,6 +481,364 @@ static void Main(string[] args)
             AssertFormatAfterTypeChar(code, expected);
         }
 
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideSingleLineRegularComment_1()
+        {
+            var code = @"class Program
+{
+                              //        {$$
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              //        {
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideSingleLineRegularComment_2()
+        {
+            var code = @"class Program
+{
+                              //        {$$   
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              //        {   
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideMultiLineRegularComment_1()
+        {
+            var code = @"class Program
+{
+    static void Main(int          a/*         {$$       */, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+    static void Main(int          a/*         {       */, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideMultiLineRegularComment_2()
+        {
+            var code = @"class Program
+{
+    static void Main(int          a/*         {$$
+        */, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+    static void Main(int          a/*         {
+        */, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideMultiLineRegularComment_3()
+        {
+            var code = @"class Program
+{
+    static void Main(int          a/*         {$$    
+        */, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+    static void Main(int          a/*         {    
+        */, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideSingleLineDocComment_1()
+        {
+            var code = @"class Program
+{
+                              ///        {$$
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              ///        {
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideSingleLineDocComment_2()
+        {
+            var code = @"class Program
+{
+                              ///        {$$   
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              ///        {   
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideMultiLineDocComment_1()
+        {
+            var code = @"class Program
+{
+                              /**        {$$   **/
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              /**        {   **/
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideMultiLineDocComment_2()
+        {
+            var code = @"class Program
+{
+                              /**        {$$   
+                **/
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              /**        {   
+                **/
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideMultiLineDocComment_3()
+        {
+            var code = @"class Program
+{
+                              /**        {$$
+                **/
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                              /**        {
+                **/
+                       static void Main(int a, int b)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideInactiveCode()
+        {
+            var code = @"class Program
+{
+                                        #if false
+                    {$$
+            #endif
+
+    static void Main(string[] args)
+    {
+
+    }
+}";
+
+            var expected = @"class Program
+{
+                                        #if false
+                    {
+            #endif
+
+    static void Main(string[] args)
+    {
+
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideStringLiteral()
+        {
+            var code = @"class Program
+{
+    static void Main(string[] args)
+    {
+        var asdas =     ""{$$""        ;
+    }
+}";
+
+            var expected = @"class Program
+{
+    static void Main(string[] args)
+    {
+        var asdas =     ""{""        ;
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideCharLiteral()
+        {
+            var code = @"class Program
+{
+    static void Main(string[] args)
+    {
+        var asdas =     '{$$'        ;
+    }
+}";
+
+            var expected = @"class Program
+{
+    static void Main(string[] args)
+    {
+        var asdas =     '{'        ;
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
+        [WorkItem(449)]
+        [WorkItem(1077103)]
+        [Fact, Trait(Traits.Feature, Traits.Features.Formatting)]
+        public void NoFormattingInsideCommentsOfPreprocessorDirectves()
+        {
+            var code = @"class Program
+{
+       #region
+        #endregion // a/*{$$*/    
+        static void Main(string[] args)
+    {
+        
+    }
+}";
+
+            var expected = @"class Program
+{
+       #region
+        #endregion // a/*{*/    
+        static void Main(string[] args)
+    {
+        
+    }
+}";
+            AssertFormatAfterTypeChar(code, expected);
+        }
+
         private static void AssertFormatAfterTypeChar(string code, string expected)
         {
             using (var workspace = CSharpWorkspaceFactory.CreateWorkspaceFromFile(code))