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2.2 Identifiers and Keywords

Identifiers are names programmers choose for their types, methods, variables, etc. An identifier must be a whole word, essentially made up of Unicode characters starting with a letter or underscore, and may not clash with a keyword. As a special case, the @ prefix may be used to avoid a clash with a keyword, but is not considered part of the identifier. For instance, the following two identifiers are equivalent:

Kofigs/backwards_R.gifn @Kofigs/backwards_R.gifn

C# identifiers are case-sensitive, though for compatibility with other languages, you should not differentiate public or protected identifiers by case alone.

Here is a list of C# keywords:

abstract
as
base
bool
break
byte
case
catch
char
checked
class
const
continue
decimal
default
delegate
do
double
else
enum
event
explicit
extern
false
finally
fixed
float
for
foreach
goto
if
implicit
in
int
interface
internal
is
lock
long
namespace
new
null
object
operator
out
override
params
private
protected
public
readonly
ref
return
sbyte
sealed
short
sizeof
stackalloc
static
string
struct
switch
this
throw
true
try
typeof
uint
ulong
unchecked
unsafe
ushort
using
virtual
void
while
    

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