Fix the fsw check for just spaces in a file name

1 files changed, 10 insertions, 1 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 45df8be254..a10cbf67aa 100644
--- a/src/System.IO.FileSystem.Watcher/src/System/IO/FileSystemWatcher.cs
+++ b/src/System.IO.FileSystem.Watcher/src/System/IO/FileSystemWatcher.cs
@@ -400,7 +400,16 @@ namespace System.IO
         /// </summary>
         private static bool IsEffectivelyEmpty(ReadOnlySpan<char> path)
         {
-            return (path.IsEmpty || path.IndexOf(' ') > -1);
+            if (path.IsEmpty)
+                return true;
+
+            foreach (char c in path)
+            {
+                if (c != ' ')
+                    return false;
+            }
+
+            return true;
         }
 #endif