# License Class

Namespace: [PIX.QMSAPI.DataObjects](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.htm)  
Assembly: PIX.dll

Contains license information.

## Inheritance

* System.Object
  * License

## Syntax

```
public class License
```

## Constructors

| Name | Description |
| --- | --- |
| [License()](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.-ctor.htm#PIX_QMSAPI_DataObjects_License__ctor) |  |

## Fields

| Name | Description |
| --- | --- |
| [Features](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.Features.htm) | A list of features available in the license. |

## Properties

| Name | Description |
| --- | --- |
| [Control](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.Control.htm#PIX_QMSAPI_DataObjects_License_Control) | The control number of the license. This is used to validate the serial number. |
| [Corporation](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.Corporation.htm#PIX_QMSAPI_DataObjects_License_Corporation) | The corporation of the licensee. |
| [LEFFile](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.LEFFile.htm#PIX_QMSAPI_DataObjects_License_LEFFile) | The LEF (License Enabler File) which defines the features of the license. |
| [LEFOk](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.LEFOk.htm#PIX_QMSAPI_DataObjects_License_LEFOk) | The current state of the LEF file. Set to true if it is valid, otherwise false. |
| [LicenseDefinition](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.LicenseDefinition.htm#PIX_QMSAPI_DataObjects_License_LicenseDefinition) |  |
| [LicenseType](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.LicenseType.htm#PIX_QMSAPI_DataObjects_License_LicenseType) | The type of the license. |
| [Name](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.Name.htm#PIX_QMSAPI_DataObjects_License_Name) | The name of the licensee. |
| [NxLicenseFeatures](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.NxLicenseFeatures.htm#PIX_QMSAPI_DataObjects_License_NxLicenseFeatures) |  |
| [Serial](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.Serial.htm#PIX_QMSAPI_DataObjects_License_Serial) | The serial number of the license. |
| [SignedKey](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.SignedKey.htm#PIX_QMSAPI_DataObjects_License_SignedKey) |  |
| [UseSignedKey](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.UseSignedKey.htm#PIX_QMSAPI_DataObjects_License_UseSignedKey) |  |

## Methods

| Name | Description |
| --- | --- |
| [IsValid(out List<String>)](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.QMSAPI.DataObjects.License.IsValid.htm#PIX_QMSAPI_DataObjects_License_IsValid_System_Collections_Generic_List_System_String___) |  |

### Extension Methods

[ApiFilter.FilterFor<T>(T, Nullable<ApiVersion>)](https://help.qlik.com/en-US/qlikview-developer/September2026/Subsystems/QMSAPIref/Content/PIX.ApiFiltering.ApiFilter.FilterFor.htm#PIX_ApiFiltering_ApiFilter_FilterFor__1___0_System_Nullable_PIX_ApiVersion__)