> ## Documentation Index
> Fetch the complete documentation index at: https://ancplua.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# AL0117 - Unnecessary LINQ materialization

> Calling ToList() or ToArray() immediately after Where(), Select(), or other LINQ operators forces eager evaluation

Source: [AL0117UnnecessaryLinqMaterializationAnalyzer.cs](https://github.com/ANcpLua/ANcpLua.Analyzers/blob/main/src/ANcpLua.Analyzers/Analyzers/AL0117UnnecessaryLinqMaterializationAnalyzer.cs)

## Description

Calling ToList() or ToArray() immediately after Where(), Select(), or other LINQ operators forces eager evaluation. If the result is only enumerated once, deferred execution avoids allocating an intermediate collection.

## Properties

* **Category**: Usage
* **Severity**: Info
* **Enabled by default**: True
* **Code fix available**: False

## Configuration

```editorconfig theme={null}
dotnet_diagnostic.AL0117.severity = info
```