Enumerations

C# allows us to create enumerations in addition to primitive data types. An enumeration represents a collection of logically related constants.

Suppose a method needs to accept a day of the week as a parameter. We have several options:

• We could accept a string value (like "Monday").

• We could accept an integer that represents the day of the week (like 2).

• We could use enumerations.

Enumerations definition

We can create an enumeration containing all days of the week to ensure the caller selects a valid, predefined constant.

An enumeration is declared using the enum keyword: