# OneAndOnlyOneSelection Class

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

## Inheritance

* System.Object
  * OneAndOnlyOneSelection

## Syntax

```
[ValueClass]
public class OneAndOnlyOneSelection : IOneAndOnlyOneSelection
```

## Constructors

| Name | Description |
| --- | --- |
| [OneAndOnlyOneSelection()](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.OneAndOnlyOneSelection.-ctor.htm#Qlik_Engine_OneAndOnlyOneSelection__ctor) |  |

## Properties

| Name | Description |
| --- | --- |
| [Cardinality](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.OneAndOnlyOneSelection.Cardinality.htm#Qlik_Engine_OneAndOnlyOneSelection_Cardinality) | JSON property name: qCardinality |
| [SelectedIndex](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.OneAndOnlyOneSelection.SelectedIndex.htm#Qlik_Engine_OneAndOnlyOneSelection_SelectedIndex) | JSON property name: qSelectedIndex |
| [Value](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.OneAndOnlyOneSelection.Value.htm#Qlik_Engine_OneAndOnlyOneSelection_Value) | JSON property name: qValue |