In this article, we will discuss how to update an item in a List in C# with a simple example of each approach.

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Learn how to update an item in a List in C#, explore different methods such as IndexOf(), Find(), and ForEach loop, and discover the most performant method based on a benchmark test.

How to Update an Item in a List in C#

List Set up for Finding and Updating Item

Find and Update an Item in a List Using Built-In Methods

Find and Update an Item in a List Using ForEach Loop

Performance Comparision of Find and Update List Item Methods

Whilst it’s an interesting discussion, the testing methods do not give valid results.
In the first method, 3 properties are checked whilst the rest of the methods only check one property.
It would be better to run tests for a randomised data set of a larger data set and determine before if you want to support only single results or multiple. If you only want to support single results sets (no duplicates in input) the the for each loop is by far the fastest when a break is included after a result is found.
By always searching for the first option, you give a massive advantage for any system that returns when it finds a result.