# Sum, Min, and Max Methods

Learn how to use the Sum, Min, and Max methods.

## We'll cover the following

So far, we’ve worked with collections of any type. We’ve used a collection of movies, or non-numerals, in our examples. Let’s learn three methods to work with collections of numbers.

## How to find the minimum and maximum of a collection

The `Sum`

, `Min`

, and `Max`

methods return the sum, minimum, and maximum of a collection of numbers, respectively. These three methods receive a delegate returning a number as a parameter.

For the following example, let’s change our `Movie`

class to contain the film duration in minutes. Then let’s find our total watch time, and the shortest and the longest film by duration.

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