diff --git a/source/Cosmos.System2/Keyboard/ConsoleKeyEx.cs b/source/Cosmos.System2/Keyboard/ConsoleKeyEx.cs
index 16a960180..bf0ae38cd 100644
--- a/source/Cosmos.System2/Keyboard/ConsoleKeyEx.cs
+++ b/source/Cosmos.System2/Keyboard/ConsoleKeyEx.cs
@@ -1,5 +1,8 @@
 namespace Cosmos.System
 {
+    /// <summary>
+    /// ConsoleKeyEx enum.
+    /// </summary>
     public enum ConsoleKeyEx
     {
         NoName,