# Class PersistenceProviderQueryExceptionExtensions

OptimaJet.Workflow.Core.Fault.PersistenceProviderQueryExceptionExtensions

Provides helper extension methods for [PersistenceProviderQueryException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/PersistenceProviderQueryException/) instances.

Namespace: [OptimaJet.Workflow.Core.Fault](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/)

```csharp
public static class PersistenceProviderQueryExceptionExtensions
```

## Methods

`public static Exception RethrowAllowedIfRetrievable(this Exception exception)` 

Returns either the original exception or a rewritten [PersistenceProviderQueryException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/PersistenceProviderQueryException/) based on the first nested [PersistenceProviderQueryException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/PersistenceProviderQueryException/) found in the inner exception chain.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `exception` | `Exception` | The exception to inspect and potentially transform. |

### Returns

| Type | Description |
| --- | --- |
| `Exception` | The original `exception` if it does not contain a nested [PersistenceProviderQueryException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/PersistenceProviderQueryException/); otherwise a new [PersistenceProviderQueryException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/PersistenceProviderQueryException/) created from the found exception's inner exception. |

[Previous PersistenceProviderQueryException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/PersistenceProviderQueryException/) [Next ProcessAlreadyExistsException](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Fault/ProcessAlreadyExistsException/)