> 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/yarn.compiler.upgrader.upgradetype.version1to2.md).

# Version1to2

Enumeration Member in [UpgradeType](/2.5/api/csharp/yarn.compiler.upgrader/yarn.compiler.upgrader.upgradetype.md)

## Summary

Indicates an upgrade from Yarn Spinner 1.0 syntax to Yarn Spinner 2.0 syntax.

```csharp
Version1to2
```