# RuntimeSpec Constructors

- Package: [Aspire.TypeSystem](/reference/api/csharp/aspire.typesystem.md)
- Type: [RuntimeSpec](/reference/api/csharp/aspire.typesystem/runtimespec.md)
- Kind: `Constructors`
- Members: `1`

Specifies the runtime execution configuration for a language.

## RuntimeSpec

- Name: `Constructor`

```csharp
public sealed class RuntimeSpec
{
    public RuntimeSpec()
    {
        // ...
    }
}
```