# DuckDBResourceBuilderExtensions

- Kind: `class`
- Package: [CommunityToolkit.Aspire.Hosting.DuckDB](/reference/api/csharp/communitytoolkit.aspire.hosting.duckdb.md)
- Version: `13.4.1-beta.706`
- Namespace: `Aspire.Hosting`
- Target framework: `net10.0`
- Source: [GitHub](https://github.com/CommunityToolkit/Aspire/blob/d479e13473b1d29d06b974f144a0049289a3cb5c/src/CommunityToolkit.Aspire.Hosting.DuckDB/DuckDBResourceBuilderExtensions.cs)

Provides extension methods for adding DuckDB resources to an application builder.

## Definition

```csharp
namespace Aspire.Hosting;

public static class DuckDBResourceBuilderExtensions
{
    // ...
}
```

## Methods

- [AddDuckDB(IDistributedApplicationBuilder, string, string?, string?)](/reference/api/csharp/communitytoolkit.aspire.hosting.duckdb/duckdbresourcebuilderextensions/methods.md#addduckdb-idistributedapplicationbuilder-string-string-string) : `IResourceBuilder<DuckDBResource>` `extension` `ats export` -- Adds a DuckDB resource to the application builder.
- [WithReadOnly(IResourceBuilder<DuckDBResource>)](/reference/api/csharp/communitytoolkit.aspire.hosting.duckdb/duckdbresourcebuilderextensions/methods.md#withreadonly-iresourcebuilder-duckdbresource) : `IResourceBuilder<DuckDBResource>` `extension` `ats export` -- Configures the DuckDB resource to open the database in read-only mode.