---
title: charset
description: Byte-order mark handling. preserve keeps whatever the file arrived with. Defaults to `preserve`
url: https://docs-v3-preview.elastic.dev/reference/core/charset
---
# charset
Byte-order mark handling. preserve keeps whatever the file arrived with.
## Values
| Value | Notes |
|-------------|-------|
| `utf-8` | |
| `utf-8-bom` | |
| `preserve` | |
**Default:** `preserve`
### `charset = utf-8`
```ini
charset = utf-8
```
```csharp
namespace N;
public class Widget
{
public int Value { get; set; }
public int Double()
{
return Value * 2;
}
}
```
```csharp
namespace N;
public class Widget
{
public int Value { get; set; }
public int Double()
{
return Value * 2;
}
}
```
### `charset = utf-8-bom`
```ini
charset = utf-8-bom
```
```csharp
namespace N;
public class Widget
{
public int Value { get; set; }
public int Double()
{
return Value * 2;
}
}
```
```csharp
namespace N;
public class Widget
{
public int Value { get; set; }
public int Double()
{
return Value * 2;
}
}
```
### `charset = preserve`
```ini
charset = preserve
```
```csharp
namespace N;
public class Widget
{
public int Value { get; set; }
public int Double()
{
return Value * 2;
}
}
```
```csharp
namespace N;
public class Widget
{
public int Value { get; set; }
public int Double()
{
return Value * 2;
}
}
```