In c#, Keywords are the predefined set of reserved words that have special meaning for the compiler. So the keywords in c# cannot be used as identifiers such as variable name, class name, etc., in our applications.
In c#, if you want to use Keywords as variable names (identifiers), you need to include @
as a prefix for your variable names. For example, @switch is a valid identifier, but the switch is not because it’s a keyword and having a special meaning for the compiler.
Following is the example of using the reserved keywords as variable names by including @
as a prefix in c# programming language.
If you observe the above c# example, we used a class keyword as a variable name (@class) by including @
as a prefix.
When you execute the above program, you will get the result as shown below.
We can use keywords as variable names in the c# programming language based on our requirements.
In c#, Keywords are differentiated into two types those are
The following table lists the available reserved keywords in the c# programming language.
abstract | bool | continue | decimal | default |
event | explicit | extern | char | checked |
class | const | break | as | base |
delegate | is | lock | long | num |
byte | case | catch | false | finally |
fixed | float | for | as | foreach |
goto | if | implicit | in | int |
interface | internal | do | double | else |
namespace | new | null | object | operator |
out | override | params | private | protected |
public | readonly | sealed | short | sizeof |
ref | return | sbyte | stackalloc | static |
string | struct | void | volatile | while |
true | try | switch | this | throw |
unchecked | unsafe | ushort | using | using static |
virtual | typeof | uint | ulong | out (generic modifier) |
In c#, Contextual keywords can be used as an identifier in a limited program context, which can be outside of the context.
Generally, whenever the new keywords are added to the C# language, those are treated as Contextual keywords to avoid breaking c# programs that we wrote in older versions.
The following table lists the available Contextual Keywords in the c# programming language.
add | alias | async | await | dynamic |
from | get | orderby | ascending | descending |
group | into | join | let | nameof |
global | partial | set | remove | select |
value | var | when | Where | yield |
These are the keywords available in the c# programming language, and we can use them in our applications based on our requirements.