CSHARP

array reduce c#

    //retorna a soma de todos os itens do array
	static int simpleArraySum(int[] ar) {
        return ar.Aggregate((acc, x) => acc + x);
    }

c# array.reduce

var sum = number.Aggregate((x, y) => x + y);

array reduce c#

Enumerable.Range(1, 10).Select(x => x + 2);