Keywords in C Sharp

The keywords of the C# language determine its features. The language has two types of keyword — contextual and reserved. The reserved keywords such as false or byte may only be used as keywords. The contextual keywords such as where or from are only treated as keywords in certain situations.

C# is case-sensitive and its keywords are always written in lower-case.

If an identifier is needed which would be the same as a reserved keyword, it may be prefixed by the @ character to distinguish it. This facilitates reuse of .NET code written in other languages.

Some frequently used keywords

finally out true byte fixed override try case

for private uint char foreach protected ulong checked goto public unchecked class if

float params typeof catch readonly unsafe const implicit ref ushort continue in return using decimal

sbyte virtual default interface sealed volatile delegate internal short void do is sizeof while double

operator throw break

int lock stackalloc

else long static

enum namespace string

event new struct as explicit null switch abstractbase extern object this bool false