https://github.com/soenneker/soenneker.extensions.enumerable

A collection of helpful enumerable extension methods
https://github.com/soenneker/soenneker.extensions.enumerable

csharp dotnet extension ienumerable

Last synced: about 1 month ago
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A collection of helpful enumerable extension methods

• Host: GitHub
• URL: https://github.com/soenneker/soenneker.extensions.enumerable
• Owner: soenneker
• License: mit
• Created: 2023-02-16T16:10:15.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2026-06-05T19:09:47.000Z (about 1 month ago)
• Last Synced: 2026-06-05T19:21:55.813Z (about 1 month ago)
• Topics: csharp, dotnet, extension, ienumerable
• Language: C#
• Homepage: https://soenneker.com
• Size: 785 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Contributing: .github/CONTRIBUTING.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE
  • Code of conduct: .github/CODE_OF_CONDUCT.md
  • Security: .github/SECURITY.md

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# ![](https://user-images.githubusercontent.com/4441470/224455560-91ed3ee7-f510-4041-a8d2-3fc093025112.png) Soenneker.Extensions.Enumerable

### A collection of helpful enumerable extension methods

## Installation

```

dotnet add package Soenneker.Extensions.Enumerable

```

## Usage

### `IEnumerable` should have `IsNullOrEmpty()` too

```csharp

var populatedList = new List{"foo", "bar", "foo"};

populatedList.IsNullOrEmpty() // false

populatedList.Populated() // true

populatedList.None() // false

```

## One call checking for null and contains any elements

```csharp

List? nullList = null;

nullList.IsNullOrEmpty() // true

nullList.Populated() // false

```

### Duplicate handling

```csharp

var containsDuplicates = populatedList.ContainsDuplicates(); // true

var deduped = populatedList.RemoveDuplicates(); // {"foo", "bar"}

```

### Recursive flattening

```csharp

public class Node 

{

    public string Name {get; set;}

    public List Children {get; set;}

}

void Example()

{

    var node = new Node(){ Name = "Node1" };

    node.Children = new List()

    {

        new Node() 

        {

            Name = "Node2"

        }

    }

    List? children = node.Children.ToFlattenedFromRecursive(c => c.Children);

    // Results in flattened List:

    // { Node1, Node2 }

}

```