# Class UnableToFindServiceException

OptimaJet.Workflow.Api.Exceptions.UnableToFindServiceException

An exception thrown when a required service is not found.

Namespace: [OptimaJet.Workflow.Api.Exceptions](https://api.workflowengine.io/web-api/OptimaJet.Workflow.Api.Exceptions/)

```csharp
public class UnableToFindServiceException : InvalidOperationException, ISerializable
```

## Type Hierarchy

-   [Exception](https://learn.microsoft.com/dotnet/api/system.exception)
    -   [SystemException](https://learn.microsoft.com/dotnet/api/system.systemexception)
        -   [InvalidOperationException](https://learn.microsoft.com/dotnet/api/system.invalidoperationexception)
            -   UnableToFindServiceException Current type
                -   Implemented interfaces
                    -   [ISerializable](https://learn.microsoft.com/dotnet/api/system.runtime.serialization.iserializable)

## Constructors

`public UnableToFindServiceException(string serviceName, string extensionMethodName)` 

An exception thrown when a required service is not found.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `serviceName` | `String` | The name of the service that was not found. |
| `extensionMethodName` | `String` | The name of the extension method that should be used to register the service. |

[Previous SnapshotIsObsoleteException](https://api.workflowengine.io/web-api/OptimaJet.Workflow.Api.Exceptions/SnapshotIsObsoleteException/) [Next WorkflowDesignerApiException](https://api.workflowengine.io/web-api/OptimaJet.Workflow.Api.Exceptions/WorkflowDesignerApiException/)