diff --git a/runtime/syntax/cs.vim b/runtime/syntax/cs.vim
index 722ddbe..104470a 100644
--- a/runtime/syntax/cs.vim
+++ b/runtime/syntax/cs.vim
@@ -3,7 +3,7 @@
 " Maintainer:          Nick Jensen <nickspoon@gmail.com>
 " Former Maintainers:  Anduin Withers <awithers@anduin.com>
 "                      Johannes Zellner <johannes@zellner.org>
-" Last Change:         2022-03-01
+" Last Change:         2022-11-16
 " Filenames:           *.cs
 " License:             Vim (see :h license)
 " Repository:          https://github.com/nickspoons/vim-cs
@@ -25,6 +25,9 @@
 syn keyword	csType	nint nuint " contextual
 
 syn keyword	csStorage	enum interface namespace struct
+syn match	csStorage	"\<record\ze\_s\+@\=\h\w*\_s*[<(:{;]"
+syn match	csStorage	"\%(\<\%(partial\|new\|public\|protected\|internal\|private\|abstract\|sealed\|static\|unsafe\|readonly\)\)\@9<=\_s\+record\>"
+syn match	csStorage	"\<record\ze\_s\+\%(class\|struct\)"
 syn match	csStorage	"\<delegate\>"
 syn keyword	csRepeat	break continue do for foreach goto return while
 syn keyword	csConditional	else if switch
@@ -44,6 +47,9 @@
 " Modifiers
 syn match	csUsingModifier	"\<global\ze\_s\+using\>"
 syn keyword	csAccessModifier	internal private protected public
+syn keyword	csModifier	operator nextgroup=csCheckedModifier skipwhite skipempty
+syn keyword	csCheckedModifier	checked contained
+
 " TODO: in new out
 syn keyword	csModifier	abstract const event override readonly sealed static virtual volatile
 syn match	csModifier	"\<\%(extern\|fixed\|unsafe\)\>"
@@ -76,7 +82,7 @@
 " Extension method parameter modifier
 syn match	csModifier	"\<this\ze\_s\+@\=\h"
 
-syn keyword	csUnspecifiedStatement	as in is nameof operator out params ref sizeof stackalloc using
+syn keyword	csUnspecifiedStatement	as in is nameof out params ref sizeof stackalloc using
 syn keyword	csUnsupportedStatement	value
 syn keyword	csUnspecifiedKeyword	explicit implicit
 
@@ -183,7 +189,7 @@
 syn match	csUnicodeNumber	+\\U00\x\{6}+ contained contains=csUnicodeSpecifier display
 syn match	csUnicodeSpecifier	+\\[uUx]+ contained display
 
-syn region	csString	matchgroup=csQuote start=+"+  end=+"+ end=+$+ extend contains=csSpecialChar,csSpecialError,csUnicodeNumber,@Spell
+syn region	csString	matchgroup=csQuote start=+"+ end=+"\%(u8\)\=+ end=+$+ extend contains=csSpecialChar,csSpecialError,csUnicodeNumber,@Spell
 syn match	csCharacter	"'[^']*'" contains=csSpecialChar,csSpecialCharError,csUnicodeNumber display
 syn match	csCharacter	"'\\''" contains=csSpecialChar display
 syn match	csCharacter	"'[^\\]'" display
@@ -200,7 +206,7 @@
 syn case	match
 syn cluster     csNumber	contains=csInteger,csReal
 
-syn region	csInterpolatedString	matchgroup=csQuote start=+\$"+ end=+"+ extend contains=csInterpolation,csEscapedInterpolation,csSpecialChar,csSpecialError,csUnicodeNumber,@Spell
+syn region	csInterpolatedString	matchgroup=csQuote start=+\$"+ end=+"\%(u8\)\=+ extend contains=csInterpolation,csEscapedInterpolation,csSpecialChar,csSpecialError,csUnicodeNumber,@Spell
 
 syn region	csInterpolation	matchgroup=csInterpolationDelimiter start=+{+ end=+}+ keepend contained contains=@csAll,csBraced,csBracketed,csInterpolationAlign,csInterpolationFormat
 syn match	csEscapedInterpolation	"{{" transparent contains=NONE display
@@ -210,10 +216,10 @@
 syn match	csInterpolationAlignDel	+,+ contained display
 syn match	csInterpolationFormatDel	+:+ contained display
 
-syn region	csVerbatimString	matchgroup=csQuote start=+@"+ end=+"+ skip=+""+ extend contains=csVerbatimQuote,@Spell
+syn region	csVerbatimString	matchgroup=csQuote start=+@"+ end=+"\%(u8\)\=+ skip=+""+ extend contains=csVerbatimQuote,@Spell
 syn match	csVerbatimQuote	+""+ contained
 
-syn region	csInterVerbString	matchgroup=csQuote start=+$@"+ start=+@$"+ end=+"+ skip=+""+ extend contains=csInterpolation,csEscapedInterpolation,csSpecialChar,csSpecialError,csUnicodeNumber,csVerbatimQuote,@Spell
+syn region	csInterVerbString	matchgroup=csQuote start=+$@"+ start=+@$"+ end=+"\%(u8\)\=+ skip=+""+ extend contains=csInterpolation,csEscapedInterpolation,csSpecialChar,csSpecialError,csUnicodeNumber,csVerbatimQuote,@Spell
 
 syn cluster	csString	contains=csString,csInterpolatedString,csVerbatimString,csInterVerbString
 
@@ -256,6 +262,7 @@
 hi def link	csModifier	StorageClass
 hi def link	csAccessModifier	csModifier
 hi def link	csAsyncModifier	csModifier
+hi def link	csCheckedModifier	csModifier
 hi def link	csManagedModifier	csModifier
 hi def link	csUsingModifier	csModifier