diff --git a/src/codegen.inc.php b/src/codegen.inc.php
index 98d0dd1..43efa59 100644
--- a/src/codegen.inc.php
+++ b/src/codegen.inc.php
@@ -55,6 +55,7 @@ function supported_tokens() : array
     'cs_propget_interface',
     'cs_propset_interface',
     'cs_propgetset_interface',
+    'cs_obsolete',
     //TODO:
     //'i18n'
   ];
diff --git a/tpl/codegen_bundle.twig b/tpl/codegen_bundle.twig
index 4a4e8b8..122d1a9 100644
--- a/tpl/codegen_bundle.twig
+++ b/tpl/codegen_bundle.twig
@@ -1,6 +1,7 @@
 //THIS FILE IS GENERATED AUTOMATICALLY, DO NOT TOUCH IT!
 using System.Collections.Generic;
 using metagen;
+using System;
 
 {%- import "macro.twig" as macro -%}
 
diff --git a/tpl/macro.twig b/tpl/macro.twig
index d1e65ce..e8bba25 100644
--- a/tpl/macro.twig
+++ b/tpl/macro.twig
@@ -188,6 +188,12 @@ ResetFieldMask();
 {% endmacro %}
 
 {%- macro attributes(o) %}
+{% if has_token(o, "cs_obsolete") %}
+/// <summary>
+/// {{token(o, "cs_obsolete")}}
+/// </summary>
+[Obsolete]
+{% endif %}
 {%- if has_token(o, 'cs_attributes') -%} 
 {%- for attr in token(o, 'cs_attributes')|split(',') -%} 
 [{{attr}}]