diff --git a/src/System.Windows.Forms.Design/src/System/ComponentModel/Design/ByteViewer.cs b/src/System.Windows.Forms.Design/src/System/ComponentModel/Design/ByteViewer.cs
index 6fb23d1c289..2bd0f17047d 100644
--- a/src/System.Windows.Forms.Design/src/System/ComponentModel/Design/ByteViewer.cs
+++ b/src/System.Windows.Forms.Design/src/System/ComponentModel/Design/ByteViewer.cs
@@ -170,11 +170,11 @@ private void DrawClient(Graphics g)
     private static bool CharIsPrintable(char c)
     {
         UnicodeCategory uc = char.GetUnicodeCategory(c);
-        return uc is not UnicodeCategory.Control
+        return uc is not (UnicodeCategory.Control
             or UnicodeCategory.Format
             or UnicodeCategory.LineSeparator
             or UnicodeCategory.ParagraphSeparator
-            or UnicodeCategory.OtherNotAssigned;
+            or UnicodeCategory.OtherNotAssigned);
     }
 
     /// <summary>