Finding first index of element that matches a condition using LINQ

Question

var item = list.Where(t => somecondition);

I would love to be able to find out the index of the element that was returned, in fact, in my case a

Answer 1

Ofcourse its possible using IEnumerable...

 public static class EnumerableExtension
    {

        public static int FirstIndexMatch(this IEnumerable items, Func matchCondition)
        {
            var index = 0;
            foreach (var item in items)
            {
                if(matchCondition.Invoke(item))
                {
                    return index;
                }
                index++;
            }
            return -1;
        }
    }