From d49af938df1dabbedd05614d03b1cf9904b623dc Mon Sep 17 00:00:00 2001
From: Steve Pfister <steve.pfister@microsoft.com>
Date: Wed, 3 Jul 2019 09:10:01 -0400
Subject: Used ROS IsWhiteSpace instead

---
 .../src/System/IO/FileSystemWatcher.cs             | 24 +---------------------
 1 file changed, 1 insertion(+), 23 deletions(-)

diff --git a/src/System.IO.FileSystem.Watcher/src/System/IO/FileSystemWatcher.cs b/src/System.IO.FileSystem.Watcher/src/System/IO/FileSystemWatcher.cs
index a10cbf67aa..e7affc5201 100644
--- a/src/System.IO.FileSystem.Watcher/src/System/IO/FileSystemWatcher.cs
+++ b/src/System.IO.FileSystem.Watcher/src/System/IO/FileSystemWatcher.cs
@@ -391,35 +391,13 @@ namespace System.IO
                 throw new ArgumentException(SR.Format(SR.InvalidDirName_NotExists, path), nameof(path));
         }
 
-#if MONO
-        /// <summary>
-        /// Returns true if the path is effectively empty for the current OS.
-        /// This function is borrowed from PathInternal.Windows because Mono
-        /// on the desktop still needs to support the netfx behavior. 
-        /// EffectivelyEmpty means an empty span, null, or just spaces ((char)32).        
-        /// </summary>
-        private static bool IsEffectivelyEmpty(ReadOnlySpan<char> path)
-        {
-            if (path.IsEmpty)
-                return true;
-
-            foreach (char c in path)
-            {
-                if (c != ' ')
-                    return false;
-            }
-
-            return true;
-        }
-#endif
-
         /// <summary>
         /// Sees if the name given matches the name filter we have.
         /// </summary>
         private bool MatchPattern(ReadOnlySpan<char> relativePath)
         {
 #if MONO
-            if (IsEffectivelyEmpty (relativePath))
+            if (relativePath.IsWhiteSpace())
                 return false;
 #endif
             ReadOnlySpan<char> name = IO.Path.GetFileName(relativePath);
-- 
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