Convert Int List Into Integer

Question

This is a bit of an odd case I must admit, but I'm trying to find a succinct and elegant way of converting a List<int> into an actual int. For example, if my list contained entries 1, 2, and 3, then the final integer would be 123. The only other way I thought of doing it was converting the array to a string and then parsing the string.

Any hints?

Answer 1

Iterate the list, as if adding a sum, but multiply the running total by 10 at each stage.

int total = 0;
foreach (int entry in list)
{
    total = 10 * total + entry;
}