---
title: csharp_trailing_comma_in_singleline_lists
description: Add a trailing comma after the last element even when the list is on one line. Defaults to `false`
url: https://docs-v3-preview.elastic.dev/reference/trailing-commas/csharp_trailing_comma_in_singleline_lists
---

# csharp_trailing_comma_in_singleline_lists
Add a trailing comma after the last element even when the list is on one line.

## Values


| Value   | Notes |
|---------|-------|
| `true`  |       |
| `false` |       |

**Default:** `false`

### `csharp_trailing_comma_in_singleline_lists = true`

```ini
csharp_trailing_comma_in_singleline_lists = true
```

<tab-set>
  <tab-item title="Before">
    ```csharp
    namespace N;

    public class Widget
    {
        public void Run()
        {
            var list = new List<int> { 1, 2, 3 };
            Register("curb", 42, true, "formatter");
        }

        private void Register(string a, int b, bool c, string d) { }
    }
    ```
  </tab-item>

  <tab-item title="After">
    ```csharp
    namespace N;

    public class Widget
    {
        public void Run()
        {
            var list = new List<int> { 1, 2, 3, };
            Register("curb", 42, true, "formatter");
        }

        private void Register(string a, int b, bool c, string d) { }
    }
    ```
  </tab-item>
</tab-set>


### `csharp_trailing_comma_in_singleline_lists = false`

```ini
csharp_trailing_comma_in_singleline_lists = false
```

<tab-set>
  <tab-item title="Before">
    ```csharp
    namespace N;

    public class Widget
    {
        public void Run()
        {
            var list = new List<int> { 1, 2, 3 };
            Register("curb", 42, true, "formatter");
        }

        private void Register(string a, int b, bool c, string d) { }
    }
    ```
  </tab-item>

  <tab-item title="After">
    ```csharp
    namespace N;

    public class Widget
    {
        public void Run()
        {
            var list = new List<int> { 1, 2, 3 };
            Register("curb", 42, true, "formatter");
        }

        private void Register(string a, int b, bool c, string d) { }
    }
    ```
  </tab-item>
</tab-set>