> For the complete documentation index, see [llms.txt](https://docs.umbraco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.umbraco.com/umbraco-ui-builder/13.latest/miscellaneous/conventions.md).

# Conventions

## Fluent Conventions

Most configuration methods in Umbraco UI Builder aim to be fluent. This means that they return a relevant config instance allowing to chain multiple methods calls together in one. For those who prefer to be a bit more verbose, many methods also accept an optional lambda expression. This allows you to pass in a delegate to perform the inner configuration of the element being defined.

```csharp
// Chaining example
config.AddSection("Repositories").Tree().AddCollection<People>(p => p.Id, "Person", "People");

// Delegate example
config.AddSection("Repositories", sectionConfig => {
    sectionConfig.Tree(treeConfig => {
        treeConfig.AddCollection<People>(p => p.Id, "Person", "People");
    });
});
```

## Naming Conventions

Throughout the API, where a method name starts with **Add** then multiple configurations can be declared. Whereas if a method name starts with **Set** then only one instance of the configuration can be declared within the current configuration context.


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