diff --git a/Frameworks/CoreText/CTFontCollection.mm b/Frameworks/CoreText/CTFontCollection.mm
index d23147030e..bce5397b04 100644
--- a/Frameworks/CoreText/CTFontCollection.mm
+++ b/Frameworks/CoreText/CTFontCollection.mm
@@ -1,6 +1,6 @@
 //******************************************************************************
 //
-// Copyright (c) 2016 Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 //
 // This code is licensed under the MIT License (MIT).
 //
@@ -17,7 +17,7 @@
 #import <CoreText/CTFontCollection.h>
 #import <StubReturn.h>
 
-const CFStringRef kCTFontCollectionRemoveDuplicatesOption = static_cast<CFStringRef>(@"kCTFontCollectionRemoveDuplicatesOption");
+const CFStringRef kCTFontCollectionRemoveDuplicatesOption = CFSTR("kCTFontCollectionRemoveDuplicatesOption");
 
 /**
  @Status NotInPlan
diff --git a/Frameworks/CoreText/CTFontManager.mm b/Frameworks/CoreText/CTFontManager.mm
index ca013661af..56dcd48cac 100644
--- a/Frameworks/CoreText/CTFontManager.mm
+++ b/Frameworks/CoreText/CTFontManager.mm
@@ -20,10 +20,9 @@
 #import <CoreGraphics/DWriteWrapper.h>
 #import <CoreGraphics/CGFontInternal.h>
 
-const CFStringRef kCTFontManagerRegisteredFontsChangedNotification =
-    static_cast<CFStringRef>(@"kCTFontManagerRegisteredFontsChangedNotification");
-const CFStringRef kCTFontManagerErrorDomain = static_cast<CFStringRef>(@"kCTFontManagerErrorDomain");
-const CFStringRef kCTFontManagerErrorFontURLsKey = static_cast<CFStringRef>(@"kCTFontManagerErrorFontURLsKey");
+const CFStringRef kCTFontManagerRegisteredFontsChangedNotification = CFSTR("kCTFontManagerRegisteredFontsChangedNotification");
+const CFStringRef kCTFontManagerErrorDomain = CFSTR("kCTFontManagerErrorDomain");
+const CFStringRef kCTFontManagerErrorFontURLsKey = CFSTR("kCTFontManagerErrorFontURLsKey");
 
 /**
  @Status Stub
diff --git a/Frameworks/CoreText/CTFrame.mm b/Frameworks/CoreText/CTFrame.mm
index e5fe0b4424..ff56d5b4b3 100644
--- a/Frameworks/CoreText/CTFrame.mm
+++ b/Frameworks/CoreText/CTFrame.mm
@@ -22,11 +22,11 @@
 #import "CGContextInternal.h"
 #import "CGPathInternal.h"
 
-const CFStringRef kCTFrameProgressionAttributeName = static_cast<CFStringRef>(@"kCTFrameProgressionAttributeName");
-const CFStringRef kCTFramePathFillRuleAttributeName = static_cast<CFStringRef>(@"kCTFramePathFillRuleAttributeName");
-const CFStringRef kCTFramePathWidthAttributeName = static_cast<CFStringRef>(@"kCTFramePathWidthAttributeName");
-const CFStringRef kCTFrameClippingPathsAttributeName = static_cast<CFStringRef>(@"kCTFrameClippingPathsAttributeName");
-const CFStringRef kCTFramePathClippingPathAttributeName = static_cast<CFStringRef>(@"kCTFramePathClippingPathAttributeName");
+const CFStringRef kCTFrameProgressionAttributeName = CFSTR("kCTFrameProgressionAttributeName");
+const CFStringRef kCTFramePathFillRuleAttributeName = CFSTR("kCTFramePathFillRuleAttributeName");
+const CFStringRef kCTFramePathWidthAttributeName = CFSTR("kCTFramePathWidthAttributeName");
+const CFStringRef kCTFrameClippingPathsAttributeName = CFSTR("kCTFrameClippingPathsAttributeName");
+const CFStringRef kCTFramePathClippingPathAttributeName = CFSTR("kCTFramePathClippingPathAttributeName");
 
 @implementation _CTFrame : NSObject
 - (instancetype)init {
diff --git a/Frameworks/CoreText/CTRun.mm b/Frameworks/CoreText/CTRun.mm
index 20916b8add..87df9bcfcd 100644
--- a/Frameworks/CoreText/CTRun.mm
+++ b/Frameworks/CoreText/CTRun.mm
@@ -29,10 +29,10 @@
 #include <algorithm>
 #include <functional>
 
-const CFStringRef kCTBackgroundStrokeColorAttributeName = static_cast<CFStringRef>(@"kCTBackgroundStrokeColorAttributeName");
-const CFStringRef kCTBackgroundFillColorAttributeName = static_cast<CFStringRef>(@"kCTBackgroundFillColorAttributeName");
-const CFStringRef kCTBackgroundCornerRadiusAttributeName = static_cast<CFStringRef>(@"kCTBackgroundCornerRadiusAttributeName");
-const CFStringRef kCTBackgroundLineWidthAttributeName = static_cast<CFStringRef>(@"kCTBackgroundLineWidthAttributeName");
+const CFStringRef kCTBackgroundStrokeColorAttributeName = CFSTR("kCTBackgroundStrokeColorAttributeName");
+const CFStringRef kCTBackgroundFillColorAttributeName = CFSTR("kCTBackgroundFillColorAttributeName");
+const CFStringRef kCTBackgroundCornerRadiusAttributeName = CFSTR("kCTBackgroundCornerRadiusAttributeName");
+const CFStringRef kCTBackgroundLineWidthAttributeName = CFSTR("kCTBackgroundLineWidthAttributeName");
 
 @implementation _CTRun : NSObject
 - (void)dealloc {
diff --git a/Frameworks/CoreText/CTTextTab.mm b/Frameworks/CoreText/CTTextTab.mm
index f6353bd96c..1580065398 100644
--- a/Frameworks/CoreText/CTTextTab.mm
+++ b/Frameworks/CoreText/CTTextTab.mm
@@ -1,6 +1,6 @@
 //******************************************************************************
 //
-// Copyright (c) 2016 Microsoft Corporation. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 //
 // This code is licensed under the MIT License (MIT).
 //
@@ -17,7 +17,7 @@
 #import <CoreText/CTTextTab.h>
 #import <StubReturn.h>
 
-const CFStringRef kCTTabColumnTerminatorsAttributeName = static_cast<CFStringRef>(@"kCTTabColumnTerminatorsAttributeName");
+const CFStringRef kCTTabColumnTerminatorsAttributeName = CFSTR("kCTTabColumnTerminatorsAttributeName");
 
 /**
  @Status Stub
diff --git a/Frameworks/CoreText/CTTypesetter.mm b/Frameworks/CoreText/CTTypesetter.mm
index 76ab5acdf7..8846c83aa8 100644
--- a/Frameworks/CoreText/CTTypesetter.mm
+++ b/Frameworks/CoreText/CTTypesetter.mm
@@ -25,8 +25,8 @@
 
 static const wchar_t* TAG = L"CTTypesetter";
 
-const CFStringRef kCTTypesetterOptionDisableBidiProcessing = static_cast<CFStringRef>(@"kCTTypesetterOptionDisableBidiProcessing");
-const CFStringRef kCTTypesetterOptionForcedEmbeddingLevel = static_cast<CFStringRef>(@"kCTTypesetterOptionForcedEmbeddingLevel");
+const CFStringRef kCTTypesetterOptionDisableBidiProcessing = CFSTR("kCTTypesetterOptionDisableBidiProcessing");
+const CFStringRef kCTTypesetterOptionForcedEmbeddingLevel = CFSTR("kCTTypesetterOptionForcedEmbeddingLevel");
 
 @implementation _CTTypesetter
 - (instancetype)initWithAttributedString:(NSAttributedString*)str {