Convert an array of 'enum' to an array of 'int'

Luckily for us, C# 3.0 includes a Cast operation:

int[] result = enumArray.Cast<int>().ToArray();

If you stop using arrays and start using IEnumerable<>, you can even get rid of the ToArray() call.

Just cast using an anonymous method:

int[] result = Array.ConvertAll<TestEnum, int>(
    enumArray, delegate(TestEnum value) {return (int) value;});

or with C# 3.0, a lambda:

int[] result = Array.ConvertAll(enumArray, value => (int) value);

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