diff --git a/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/ContentType.cs b/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/ContentType.cs
index f4a06463c14..1a54d282157 100644
--- a/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/ContentType.cs
+++ b/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/ContentType.cs
@@ -636,21 +636,7 @@ private static bool IsAsciiLetterOrDigit(char character) =>
         /// </summary>
         /// <param name="ch">input character</param>
         /// <returns></returns>
-        private static bool IsLinearWhiteSpaceChar(char ch)
-        {
-            if (ch > ' ')
-            {
-                return false;
-            }
-
-            foreach (char c in LinearWhiteSpaceChars)
-            {
-                if (ch == c)
-                    return true;
-            }
-
-            return false;
-        }
+        private static bool IsLinearWhiteSpaceChar(char ch) => LinearWhiteSpaceChars.Contains(ch);
 
         /// <summary>
         /// Lazy initialization for the ParameterDictionary