IEnumerable<IEnumerable<T>> to string[][]

Question

How do I cast a IEnumerable<IEnumerable<T>> to a string[][] or a List<string[]>?

I already tried .toArray and .SelectMany but they seem to create either string[] or List<IEnumerable<string>> which is not what I really want.

Answer 1

You could use Select to map each inner IEnumerable<string> to a string[]:

string[][] arrayOfStringArrays = enumerable.Select(innerEnumerable => innerEnumerable.ToArray()).ToArray();