# Module: Azaion.Common.Extensions.StringExtensions

## Purpose
Provides a `ToSnakeCase` string extension for converting PascalCase/camelCase identifiers to snake_case.

## Public Interface

| Method | Signature | Description |
|--------|-----------|-------------|
| `ToSnakeCase` | `static string ToSnakeCase(this string text)` | Converts PascalCase to snake_case (e.g., `PasswordHash` → `password_hash`) |

## Internal Logic
Iterates characters; prepends `_` before each uppercase letter and lowercases it. Returns original text for null/empty/single-char inputs.

## Dependencies
- `System.Text.StringBuilder` (BCL only)

## Consumers
- `AzaionDbSchemaHolder` — uses `ToSnakeCase` to map C# property names to PostgreSQL column names

## Data Models
None.

## Configuration
None.

## External Integrations
None.

## Security
None.

## Tests
None.