---
title: Do Not Import Unused Namespaces
impact: LOW
impactDescription: reduces clutter
tags: imports, cleanup, quality, csharp
---

## Do Not Import Unused Namespaces

Unused `using` directives clutter the file.

**Incorrect:**

```csharp
using System;
using System.Text; // Unused
using System.Linq; // Unused

public class User { }
```

**Correct:**

```csharp
using System;

public class User { }
```

**Tools:** Visual Studio "Remove Unused Usings", Roslyn Analyzers (IDE0005)