---
title: HelloWorld
summary: Diagnostic scaffolding WebMethod that returns a constant string.
status: draft
owner: "Not determined from source"
last_reviewed: 2026-09-22
---

# HelloWorld (OP-01)

## Request and response

`HelloWorld` takes no parameters.

| Part | Type | Description |
| --- | --- | --- |
| `<return>` | `String` | The constant literal `"Hello World"`. No other value is ever returned. |

## WebMethod attributes

`<WebMethod()>` — bare, no arguments supplied.

## Steps

1. Return the constant string `"Hello World"`.

There is no access check, no branch and no directory interaction anywhere in this operation.

## Process flow

```mermaid
flowchart TD
    A["Call HelloWorld"] --> B["Return literal <br>Hello World"]
```

## Shared state effects

None — this operation touches no process-wide state and no instance field.

## Error handling

This operation cannot fail: it contains no conditional logic, no directory call and no `Try`/`Catch`. No caller-visible fault is possible. See [Faults](../faults.md) for the service-wide fault model.

## Authorization

None in code. This is one of the eleven ungated operations — see [Authentication and authorization](../authentication-authorization.md).

This is Visual Studio ASMX project scaffolding left in place on the published, live contract (tech debt TD-16) — see [Tech debt](../tech-debt.md).

## Related documentation
- [Service index](../index.md)
- [Overview](../overview.md)
- [Architecture](../architecture.md)
- [Activation and hosting](../activation-hosting.md)
- [Operations](../operations.md)
- [Operations and processes](../operations-processes.md)
- [Business rules](../business-rules.md)
- [Authentication and authorization](../authentication-authorization.md)
- [Configuration](../configuration.md)
- [Dependencies](../dependencies.md)
- [Faults](../faults.md)
- [Operational runbook](../operational-runbook.md)
- [Tech debt](../tech-debt.md)

## Sources
- `src\ADUserServices\clsADUserServices.asmx.vb` (lines 86-89)