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What are reserved keywords in C#?
Keywords are reserved words predefined to the C# compiler. These keywords cannot be used as identifiers. If you want to use these keywords as identifiers, you may prefix the keyword with the @ character.
In C#, some identifiers have special meaning in the context of code, such as get and set are called contextual keywords.
The following table lists the reserved 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 | in (generic modifier) | int |
| interface | internal | is | lock | long | namespace | new |
| null | Object | operator | out | out (generic modifier) | 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 |
| volatile | While |
Let us see an example of using bool reserved keyword in C# −
Example
using System;
using System.Collections;
class Demo {
static void Main() {
bool[] arr = new bool[5];
arr[0] = true;
arr[1] = true;
arr[2] = false;
arr[3] = false;
BitArray bArr = new BitArray(arr);
foreach (bool b in bArr) {
Console.WriteLine(b);
}
bool str = arr[1];
Console.WriteLine("Value of 2nd element:"+str);
}
}Output
True True False False False Value of 2nd element:True
Updated on: 20-Jun-2020
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