> 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/2.0/api/csharp/yarn/yarn.builtintypes.md).

# BuiltinTypes

Class in [Yarn](/2.0/api/csharp/yarn.md)

Inherits from `System.Object`

## Summary

Contains the built-in types available in the Yarn language.

```csharp
public static class BuiltinTypes
```

## Properties

| Name                                                                                     | Description                                                              |
| ---------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ |
| [Any](/2.0/api/csharp/yarn/yarn.builtintypes/yarn.builtintypes.any.md)                   | Gets the type representing any value.                                    |
| [Boolean](/2.0/api/csharp/yarn/yarn.builtintypes/yarn.builtintypes.boolean.md)           | Gets the type representing boolean values.                               |
| [Number](/2.0/api/csharp/yarn/yarn.builtintypes/yarn.builtintypes.number.md)             | Gets the type representing numbers.                                      |
| [String](/2.0/api/csharp/yarn/yarn.builtintypes/yarn.builtintypes.string.md)             | Gets the type representing strings.                                      |
| [TypeMappings](/2.0/api/csharp/yarn/yarn.builtintypes/yarn.builtintypes.typemappings.md) | Gets a dictionary that maps CLR types to their corresponding Yarn types. |