https://gist.github.com/pinzolo/2970346 からfork。ファイル名をまず設定

sakura_keyword_csharp.kwd

// C# キーワード定義ファイル
// CASE=True

#endif
#endregion
#if
#pragma
#region
abstract
as
base
bool
break
byte
case
catch
char
class
const
continue
decimal
default
do
double
else
enum
finally
float
for
foreach
get
goto
if
int
interface
internal
is
lock
long
namespace
native
new
null
object
partial
private
protected
public
readonly
return
sbyte
set
short
static
string
struct
switch
this
throw
try
typeof
uint
ulong
ushort
using
virtual
void
volatile
while
yield