How to enumerate an enum?

How can you enumerate an enum in C#?

E.g., the following code does not compile:
public enum Suit
{
Spades,
Hearts,
Clubs,
Diamonds
}

public void EnumerateAllSuitsDemoMethod()
{
foreach (Suit suit in Suit)
{
DoSomething(suit);
}
}


And it gives the following compile-time error:

'Suit' is a 'type' but is used like a 'variable'

It fails on the Suit keyword, the second one.

Update: If you're using .NET 5 or newer, use this solution.

foreach (Suit suit in (Suit[]) Enum.GetValues(typeof(Suit)))
{
}

Note: The cast to (Suit[]) is not strictly necessary, but it does make the code 0.5 ns faster.

Stack Overflow Q#105372, score: 5324