Finding the last index of an array

With C# 8:

int[] array = { 1, 3, 5 };
var lastItem = array[^1]; // 5

LINQ provides Last():

csharp> int[] nums = {1,2,3,4,5};
csharp> nums.Last();              
5

This is handy when you don't want to make a variable unnecessarily.

string lastName = "Abraham Lincoln".Split().Last();