diff --git a/xml/System.IO.Enumeration/FileSystemName.xml b/xml/System.IO.Enumeration/FileSystemName.xml
index 017fabd180e..21d381c2848 100644
--- a/xml/System.IO.Enumeration/FileSystemName.xml
+++ b/xml/System.IO.Enumeration/FileSystemName.xml
@@ -87,7 +87,17 @@
         <summary> Verifies if the given Win32 expression matches the given name. Supports the following wildcards: '*', '?', '&lt;', '&gt;', '"'. The backslash character '\' escapes.</summary>
         <returns>
           <see langword="true" /> if the given expression matches the given name; otherwise, <see langword="false" />.</returns>
-        <remarks>To be added.</remarks>
+        <remarks>
+          <format type="text/markdown"><![CDATA[
+
+## Remarks
+
+The syntax of the `expression` parameter is based on the syntax used by <xref:System.IO.FileSystemWatcher>, which is based on [RtlIsNameInExpression](/windows/win32/devnotes/rtlisnameinexpression), which defines the rules for matching DOS wildcards (`'*'`, `'?'`, `'<'`, `'>'`, `'"'`).
+ 
+Matching will not correspond to Win32 behavior unless you transform the expression using <xref:System.IO.Enumeration.FileSystemName.TranslateWin32Expression(System.String)>.
+
+          ]]></format>
+        </remarks>
       </Docs>
     </Member>
     <Member MemberName="TranslateWin32Expression">