# ParameterDefault

- Kind: `class`
- 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/ParameterDefault.cs)

Represents how a default value should be retrieved.

## Definition

```csharp
namespace Aspire.Hosting.ApplicationModel;

public abstract class ParameterDefault
{
    // ...
}
```

## Methods

- [GetDefaultValue](/reference/api/csharp/aspire.hosting/parameterdefault/methods.md#getdefaultvalue) : `string` `abstract` -- Generates a value for the parameter.
- [WriteToManifest(ManifestPublishingContext)](/reference/api/csharp/aspire.hosting/parameterdefault/methods.md#writetomanifest-manifestpublishingcontext) `abstract` -- Writes the current [ParameterDefault](/reference/api/csharp/aspire.hosting/parameterdefault.md) to the manifest context.