Reserved words
Reserved words are names or identifiers that have predefined meanings to the compiler. They cannot be used as a user-defined identifiers unless they are prefixed with the verbatim character @.
Below are all the reserved words in C# (Docs, 2017).
| 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 | using static | virtual | void |
| volatile | while |
Contextual keywords
They only have special meanings under certain contexts (Docs, 2017).
| add | alias | ascending |
| async | await | descending |
| dynamic | from | get |
| global | group | into |
| join | let | nameof |
| orderby | partial (type) | partial (method) |
| remove | select | set |
| value | var | when (filter condition) |
| where (generic type constraint) | where (query clause) | yield |
References
- Docs, M. (2017, March 7). C# Keywords. Retrieved from https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/