# Class Extensions

OptimaJet.Workflow.DbPersistence.Extensions

Namespace: [OptimaJet.Workflow.DbPersistence](https://api.workflowengine.io/sql-server/OptimaJet.Workflow.DbPersistence/)

```csharp
public static class Extensions
```

## Methods

`public static bool IsDeadLockException(this Exception exception)` 

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `exception` | `Exception` |  |

### Returns

| Type | Description |
| --- | --- |
| `Boolean` |  |

`public static bool CanRepeatQuery(this Exception exception)` 

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `exception` | `Exception` |  |

### Returns

| Type | Description |
| --- | --- |
| `Boolean` |  |

`public static PersistenceProviderQueryException ToQueryException(this Exception exception, bool suppressRetry = false)` 

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `exception` | `Exception` |  |
| `suppressRetry` | `Boolean` |  |

### Returns

| Type | Description |
| --- | --- |
| `PersistenceProviderQueryException` |  |

`public static bool IsDuplicateKeyException(this PersistenceProviderQueryException exception)` 

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `exception` | `PersistenceProviderQueryException` |  |

### Returns

| Type | Description |
| --- | --- |
| `Boolean` |  |

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