# ExistingAzureResourceExtensions

- Kind: `class`
- Package: [Aspire.Hosting.Azure](/reference/api/csharp/aspire.hosting.azure.md)
- Version: `13.4.0`
- Namespace: `Aspire.Hosting`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/cbc352350f1a9bafbaff10d14a2c8de4ac186a48/src/Aspire.Hosting.Azure/ExistingAzureResourceExtensions.cs)

Extension methods for interacting with resources that are not managed by Aspire's provisioning or container management layer.

## Definition

```csharp
namespace Aspire.Hosting;

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

## Methods

- [AsExisting(IResourceBuilder<T>, IResourceBuilder<ParameterResource>, IResourceBuilder<ParameterResource>)](/reference/api/csharp/aspire.hosting.azure/existingazureresourceextensions/methods.md#asexisting-iresourcebuilder-t-iresourcebuilder-parameterresource-iresourcebuilder-parameterresource) : `IResourceBuilder<T>` `extension` `ats ignored` -- Marks the resource as an existing resource in both run and publish modes.
- [IsExisting(IResource)](/reference/api/csharp/aspire.hosting.azure/existingazureresourceextensions/methods.md#isexisting-iresource) : `bool` `extension` `ats ignored` -- Determines if the resource is an existing resource.
- [PublishAsExisting(IResourceBuilder<T>, IResourceBuilder<ParameterResource>, IResourceBuilder<ParameterResource>)](/reference/api/csharp/aspire.hosting.azure/existingazureresourceextensions/methods.md#publishasexisting-iresourcebuilder-t-iresourcebuilder-parameterresource-iresourcebuilder-parameterresource) : `IResourceBuilder<T>` `extension` `ats ignored` -- Marks the resource as an existing resource when the application is deployed.
- [PublishAsExisting(IResourceBuilder<T>, string, string?)](/reference/api/csharp/aspire.hosting.azure/existingazureresourceextensions/methods.md#publishasexisting-iresourcebuilder-t-string-string) : `IResourceBuilder<T>` `extension` `ats ignored` -- Marks the resource as an existing resource when the application is deployed.
- [RunAsExisting(IResourceBuilder<T>, IResourceBuilder<ParameterResource>, IResourceBuilder<ParameterResource>)](/reference/api/csharp/aspire.hosting.azure/existingazureresourceextensions/methods.md#runasexisting-iresourcebuilder-t-iresourcebuilder-parameterresource-iresourcebuilder-parameterresource) : `IResourceBuilder<T>` `extension` `ats ignored` -- Marks the resource as an existing resource when the application is running.
- [RunAsExisting(IResourceBuilder<T>, string, string?)](/reference/api/csharp/aspire.hosting.azure/existingazureresourceextensions/methods.md#runasexisting-iresourcebuilder-t-string-string) : `IResourceBuilder<T>` `extension` `ats ignored` -- Marks the resource as an existing resource when the application is running.