Question

How to check whether array2 is subset of array1 or not? In other words I want to check whether all elements of array2 are present in array1 or not? I want solution in Lambda or Linq.

int[] array1 = {6, 3, 1, 4, 5, 2};
int[] array2 = {1, 2, 3};

Answer 1

If I understood your question:

using System.Linq;

if (!array2.Except(array1).Any())
{
    ...validated!
}