Question

Are enum types stored as ints in C#?

Will the enum below be represented as 0, 1, 2?

If not, what’s the lightest way to define an enum?

public enum ColumnType
{
    INT,STRING,OBJECT
}

Answer 1

From the MSDN

The default underlying type of enumeration elements is int.

By default, the first enumerator has the value 0, and the value of each successive enumerator is increased by 1.

So your assumptions are correct. Enums are stored as ints and your example will be represented as 0, 1, 2. However, you shouldn’t rely on this and always refer to them by their assigned name just in case someone overrides the default.