> 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/3.1/api/csharp/yarn.compiler/yarn.compiler.project/yarn.compiler.project.isvalidversionnumber.md).

# IsValidVersionNumber(int)

Method in [Project](/3.1/api/csharp/yarn.compiler/yarn.compiler.project.md)

## Summary

Gets a value indicating whether `number` is a valid Yarn Spinner version number.

```csharp
public static bool IsValidVersionNumber(int number)
```

## Parameters

| Name         | Description |
| ------------ | ----------- |
| `int` number |             |