Some words have special meaning for the compiler C#. These can’t are using how identifiers, at least that using the “@” before of same.
Ex.: @if is an identifier accepts, but IF don’t, because is an word reserved.
WORS RESERVED IN C#:
| abstract | event | new | struct |
| as | explicit | null | switch |
| base | extern | object | this |
| bool | false | operator | throw |
| break | finally | out | true |
| byte | fixed | override | try |
| case | float | params | typeof |
| catch | for | private | uint |
| char | foreach | protected | ulong |
| checked | goto | public | unchecked |
| class | if | readonly | unsafe |
| const | implicit | ref | ushort |
| continue | in | return | using |
| decimal | int | sbyte | virtual |
| default | interface | sealed | volatile |
| delegate | internal | short | void |
| do | is | sizeof | while |
| double | lock | stackalloc | |
| else | long | static | |
| enum | namespace | string |
Rafaela Azevedo 
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