# Configuration provider

### Overview

[**Configuration provider**](https://github.com/vostok/configuration.abstractions/blob/master/Vostok.Configuration.Abstractions/IConfigurationProvider.cs) is responsible for the [binding process](/configuration/concepts-and-basics/binding-nodes-to-models.md) and offers methods to obtain final settings models. It's also responsible for [caching](/configuration/concepts-and-basics/caching-and-performance.md) and [error handling](/configuration/concepts-and-basics/error-handling.md). Providers are used directly by the application code to either [obtain settings on demand](/configuration/basic-scenarios/obtain-settings-from-provider.md) or [subscribe to updates](/configuration/basic-scenarios/observe-settings-via-provider.md). 

### Methods

#### Get method

Fetches the newest version of settings of given type:

```
var settings = provider.Get<MySettings>();
```

#### Observe method

Allows to subscribe for updates of settings of given type:

```
provider.Observe<MySettings>.Subscribe(newSettings => {});
```

#### Overloads

Both **Get** and **Observe** methods have 2 variations:

* The one without any parameters requires a prior [assignment](/configuration/basic-scenarios/assign-sources-to-types.md) of a source to the requested type;
* The one with a [source](/configuration/concepts-and-basics/configuration-sources.md) parameter requires no such assignment (check out [caching](/configuration/concepts-and-basics/caching-and-performance.md) for gotchas);

### Related pages

{% content-ref url="/pages/-M6UVVWxjimC0yLfXc\_P" %}
[Obtain settings from provider](/configuration/basic-scenarios/obtain-settings-from-provider.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M6UVXzWRFlbId1t7QdO" %}
[Observe settings via provider](/configuration/basic-scenarios/observe-settings-via-provider.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M6UQlGKGPuVt1P3lsHf" %}
[Binding nodes to models](/configuration/concepts-and-basics/binding-nodes-to-models.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M6UQMklC2EtQ\_nAUDjI" %}
[Configuration sources](/configuration/concepts-and-basics/configuration-sources.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M6UVN1ntnmh0ltnCI5I" %}
[Assign sources to types](/configuration/basic-scenarios/assign-sources-to-types.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M6URAB0ITAnAJKMQJ6y" %}
[Caching and performance](/configuration/concepts-and-basics/caching-and-performance.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M6UR6uAo\_v35e9-OcDC" %}
[Error handling](/configuration/concepts-and-basics/error-handling.md)
{% endcontent-ref %}


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