> For the complete documentation index, see [llms.txt](https://docs.yarnspinner.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yarnspinner.dev/2.5/api/csharp/yarn.compiler.upgrader/yarn.compiler.upgrader.upgradetype.md).

# UpgradeType

Enum in [Yarn.Compiler.Upgrader](/2.5/api/csharp/yarn.compiler.upgrader.md)

Inherits from `System.Enum`

## Summary

Specifies what kind of language upgrading should be applied.

```csharp
public enum UpgradeType
{
    Version1to2
}
```

## Members

| Name                                                                                                                                       | Description                                                                   |
| ------------------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------------------------------------------- |
| [Version1to2](/2.5/api/csharp/yarn.compiler.upgrader/yarn.compiler.upgrader.upgradetype/yarn.compiler.upgrader.upgradetype.version1to2.md) | Indicates an upgrade from Yarn Spinner 1.0 syntax to Yarn Spinner 2.0 syntax. |