# Compiler Warning ASPIREWATCH001

<Badge
  text="Version introduced: 13.5"
  variant="note"
  size="large"
  class:list={'mb-1'}
/>

> Run mode configuration types and members are for evaluation purposes only and are subject to change or removal in future updates. Suppress this diagnostic to proceed.

This diagnostic warning is reported when using experimental run mode configuration APIs in Aspire, including:

- `RunConfiguration` class
- `DistributedApplicationExecutionContext.RunConfiguration` property
- `DistributedApplicationExecutionContextOptions.RunConfiguration` property

These APIs let integrations vary how their resources are launched based on the kind of run being performed, without changing the core hosting behavior. In publish mode, every property on `RunConfiguration` holds its default value.

## Example

The following code generates `ASPIREWATCH001`:

```csharp title="Reading run mode configuration"
var builder = DistributedApplication.CreateBuilder(args);

if (builder.ExecutionContext.IsRunMode)
{
    var runConfiguration = builder.ExecutionContext.RunConfiguration;

    if (runConfiguration.WatchEnabled)
    {
        // Launch resources so source changes are hot-reloaded.
    }
}

builder.Build().Run();
```

## Understanding run mode configuration

`RunConfiguration` holds settings that only apply when the AppHost is running in [run mode](/app-host/resource-lifetimes/) (as opposed to publish mode). Integrations use it to vary how their resources are launched without changing the core hosting behavior.

### `WatchEnabled`

Indicates that resources should start in watch mode if able. Integrations that support watch can launch their resources so that source changes are hot-reloaded. This is a hint: integrations that cannot watch their resources should start them in the normal fashion.

## To suppress this warning

Suppress the warning with either of the following methods:

- Set the severity of the rule in the _.editorconfig_ file.

  ```ini title=".editorconfig"
  [*.{cs,vb}]
  dotnet_diagnostic.ASPIREWATCH001.severity = none
  ```

  For more information about editor config files, see [Configuration files for code analysis rules](/diagnostics/overview/#suppress-in-the-editorconfig-file).

- Add the following `PropertyGroup` to your project file:

  ```xml title="C# project file"
  <PropertyGroup>
      <NoWarn>$(NoWarn);ASPIREWATCH001</NoWarn>
  </PropertyGroup>
  ```

- Suppress in code with the `#pragma warning disable ASPIREWATCH001` directive:

  ```csharp title="Suppressing the warning"
  var builder = DistributedApplication.CreateBuilder(args);

  #pragma warning disable ASPIREWATCH001
  var runConfiguration = builder.ExecutionContext.RunConfiguration;
  #pragma warning restore ASPIREWATCH001

  builder.Build().Run();
  ```