# IValueProvider

- Kind: `interface`
- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Version: `13.4.0`
- Namespace: `Aspire.Hosting.ApplicationModel`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/a3766e994fd2cba86c8ac60b8a80268cab7e6383/src/Aspire.Hosting/ApplicationModel/IValueProvider.cs)

An interface that allows the value to be provided for an environment variable.

## Definition

```csharp
namespace Aspire.Hosting.ApplicationModel;

public interface IValueProvider
{
    // ...
}
```

## Methods

- [GetValueAsync(CancellationToken)](/reference/api/csharp/aspire.hosting/ivalueprovider/methods.md#getvalueasync-cancellationtoken) : `ValueTask<string?>` `abstract` -- Gets the value for use as an environment variable.
- [GetValueAsync(ValueProviderContext, CancellationToken)](/reference/api/csharp/aspire.hosting/ivalueprovider/methods.md#getvalueasync-valueprovidercontext-cancellationtoken) : `ValueTask<string?>` `virtual` -- Gets the value for use as an environment variable in the specified context.