Advice needed on 'HandlebarsConfiguration.UnresolvedBindingFormatter' is obsolete

I get this message
```
'HandlebarsConfiguration.UnresolvedBindingFormatter' is obsolete: 'Register custom formatters using `Formatters` property'
```

With this c# code:
``` c#
private static readonly HandlebarsConfiguration HandlebarsConfiguration = new HandlebarsConfiguration
        {
            UnresolvedBindingFormatter = "{0}"
        };
```