From 68ba94218a6e12ab8d88850bf3d5e39e558bfc6f Mon Sep 17 00:00:00 2001
From: Justin Kotalik <jukotali@microsoft.com>
Date: Tue, 18 Jul 2017 09:08:49 -0700
Subject: [PATCH] IsNullOrWhiteSpace => IsNullOrEmpty

---
 .../Internal/ParsingHelpers.cs                            | 8 ++++----
 src/Microsoft.AspNetCore.Http/HeaderDictionary.cs         | 2 +-
 .../DictionaryStringValuesWrapper.cs                      | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/Microsoft.AspNetCore.Http.Abstractions/Internal/ParsingHelpers.cs b/src/Microsoft.AspNetCore.Http.Abstractions/Internal/ParsingHelpers.cs
index 173ea4438d..59ffd2bf19 100644
--- a/src/Microsoft.AspNetCore.Http.Abstractions/Internal/ParsingHelpers.cs
+++ b/src/Microsoft.AspNetCore.Http.Abstractions/Internal/ParsingHelpers.cs
@@ -55,7 +55,7 @@ namespace Microsoft.AspNetCore.Http.Internal
                 throw new ArgumentNullException(nameof(headers));
             }
 
-            if (string.IsNullOrWhiteSpace(key))
+            if (string.IsNullOrEmpty(key))
             {
                 throw new ArgumentNullException(nameof(key));
             }
@@ -72,7 +72,7 @@ namespace Microsoft.AspNetCore.Http.Internal
         // Quote items that contain comas and are not already quoted.
         private static string QuoteIfNeeded(string value)
         {
-            if (!string.IsNullOrWhiteSpace(value) &&
+            if (!string.IsNullOrEmpty(value) &&
                 value.Contains(',') &&
                 (value[0] != '"' || value[value.Length - 1] != '"'))
             {
@@ -83,7 +83,7 @@ namespace Microsoft.AspNetCore.Http.Internal
 
         private static string DeQuote(string value)
         {
-            if (!string.IsNullOrWhiteSpace(value) &&
+            if (!string.IsNullOrEmpty(value) &&
                 (value.Length > 1 && value[0] == '"' && value[value.Length - 1] == '"'))
             {
                 value = value.Substring(1, value.Length - 2);
@@ -99,7 +99,7 @@ namespace Microsoft.AspNetCore.Http.Internal
                 throw new ArgumentNullException(nameof(headers));
             }
 
-            if (string.IsNullOrWhiteSpace(key))
+            if (string.IsNullOrEmpty(key))
             {
                 throw new ArgumentNullException(nameof(key));
             }
diff --git a/src/Microsoft.AspNetCore.Http/HeaderDictionary.cs b/src/Microsoft.AspNetCore.Http/HeaderDictionary.cs
index 30d338a20b..b0224d25ee 100644
--- a/src/Microsoft.AspNetCore.Http/HeaderDictionary.cs
+++ b/src/Microsoft.AspNetCore.Http/HeaderDictionary.cs
@@ -100,7 +100,7 @@ namespace Microsoft.AspNetCore.Http
                 long value;
                 var rawValue = this[HeaderNames.ContentLength];
                 if (rawValue.Count == 1 &&
-                    !string.IsNullOrWhiteSpace(rawValue[0]) &&
+                    !string.IsNullOrEmpty(rawValue[0]) &&
                     HeaderUtilities.TryParseNonNegativeInt64(new StringSegment(rawValue[0]).Trim(), out value))
                 {
                     return value;
diff --git a/src/Microsoft.AspNetCore.Owin/DictionaryStringValuesWrapper.cs b/src/Microsoft.AspNetCore.Owin/DictionaryStringValuesWrapper.cs
index bef2a0e27c..b31c7e9790 100644
--- a/src/Microsoft.AspNetCore.Owin/DictionaryStringValuesWrapper.cs
+++ b/src/Microsoft.AspNetCore.Owin/DictionaryStringValuesWrapper.cs
@@ -56,7 +56,7 @@ namespace Microsoft.AspNetCore.Owin
                 }
 
                 if (rawValue.Length == 1 &&
-                    !string.IsNullOrWhiteSpace(rawValue[0]) &&
+                    !string.IsNullOrEmpty(rawValue[0]) &&
                     HeaderUtilities.TryParseNonNegativeInt64(new StringSegment(rawValue[0]).Trim(), out value))
                 {
                     return value;