# ConnectionPropertiesExtensions

- Kind: `class`
- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Version: `13.3.0`
- Namespace: `Aspire.Hosting`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ConnectionPropertiesExtensions.cs)

Provides extension methods for adding connection properties to resources.

## Definition

```csharp
namespace Aspire.Hosting;

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

## Methods

- [CombineProperties(IResourceWithConnectionString, IEnumerable<KeyValuePair<string, ReferenceExpression>>)](/reference/api/csharp/aspire.hosting/connectionpropertiesextensions/methods.md#combineproperties-iresourcewithconnectionstring-ienumerable-keyvaluepair-string-referenceexpression) : `IEnumerable<KeyValuePair<string, ReferenceExpression>>` `extension` `ats ignored` -- Combines two sets of connection properties, with properties from the additional set overriding those in the source set in case of key conflicts.