# Intersect

Ever want to find out what is common in two arrays or lists? The Intersect method is the way to do it.

## Basic example

Below is an example of two lists of numbers. In one array, `set1`

, it has a list of numbers in multiples of 10, e.g. 10, 20, 30 and so on. Whilst `set2`

are in multiples of 5, as in they go up in 5, 10, 15, etc. Performing an Intersect on these lists will identify what is common in both.

Live example: https://dotnetfiddle.net/3LGld2

```
var set1 = new[] { 10, 20, 30, 40, 50, 60 };
var set2 = new[] { 5, 10, 15, 20, 25, 30, 35 };
var result = set1.Intersect(set2);
//output: 10, 20, 30
```