Refactor foreach and if's to Linq

Question

Would it be possible to combine all the given code to linq, which then would return 'true' or 'false'? Or is this fine the way it is?

If it is possible, would there be a significant performance difference?(The array and list won't contain more than 100 elements)

foreach (var item in myArray)
{
    if (myList.Exists(x => x.Value == item))
    {
        amountTrue++;
    }
}

if (myArray.Count() == amountTrue)
{
    isValid = true;
}

Answer 1

As far as I can see, the code is designed to check

if all the items of the myArray are in the myExists

the implementation:

  isValid = myArray
    .All(item => myList.Exists(x => x.Value == item));

if you want to refactor for performace as well as for readability, have a look for bottlenecks. Say, is it myList.Exists that slows down? In that case think of HashSet<T> where T is a type of x.Value etc.