diff --git a/runtime/ftplugin/cs.vim b/runtime/ftplugin/cs.vim
index 7c2cbda..f53ffcb 100644
--- a/runtime/ftplugin/cs.vim
+++ b/runtime/ftplugin/cs.vim
@@ -1,29 +1,43 @@
 " Vim filetype plugin file
-" Language:	C#
-" Maintainer:	Johannes Zellner <johannes@zellner.org>
-" Last Change:	Tue, 09 Mar 2004 14:09:33 CET
+" Language:            C#
+" Maintainer:          Nick Jensen <nickspoon@gmail.com>
+" Former Maintainer:   Johannes Zellner <johannes@zellner.org>
+" Last Change:         2021-12-07
+" License:             Vim (see :h license)
+" Repository:          https://github.com/nickspoons/vim-cs
 
-" Only do this when not done yet for this buffer
-if exists("b:did_ftplugin")
+if exists('b:did_ftplugin')
   finish
 endif
-
-" Don't load another plugin for this buffer
 let b:did_ftplugin = 1
-let s:keepcpo= &cpo
-set cpo&vim
+
+let s:save_cpo = &cpoptions
+set cpoptions&vim
 
 " Set 'formatoptions' to break comment lines but not other lines,
 " and insert the comment leader when hitting <CR> or using "o".
-setlocal fo-=t fo+=croql
+setlocal formatoptions-=t formatoptions+=croql
 
 " Set 'comments' to format dashed lists in comments.
 setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://
 
-if has("gui_win32") && !exists("b:browsefilter")
-    let b:browsefilter = "C# Source Files (*.cs)\t*.cs\n" .
-		       \ "All Files (*.*)\t*.*\n"
+let b:undo_ftplugin = 'setl com< fo<'
+
+if exists('loaded_matchit') && !exists('b:match_words')
+  " #if/#endif support included by default
+  let b:match_words = '\%(^\s*\)\@<=#\s*region\>:\%(^\s*\)\@<=#\s*endregion\>,'
+  let b:undo_ftplugin .= ' | unlet! b:match_words'
 endif
 
-let &cpo = s:keepcpo
-unlet s:keepcpo
+if (has('gui_win32') || has('gui_gtk')) && !exists('b:browsefilter')
+  let b:browsefilter = "C# Source Files (*.cs *.csx)\t*.cs;*.csx\n" .
+        \              "C# Project Files (*.csproj)\t*.csproj\n" .
+        \              "Visual Studio Solution Files (*.sln)\t*.sln\n" .
+        \              "All Files (*.*)\t*.*\n"
+  let b:undo_ftplugin .= ' | unlet! b:browsefilter'
+endif
+
+let &cpoptions = s:save_cpo
+unlet s:save_cpo
+
+" vim:et:sw=2:sts=2