# IsOneAndOnlyOne Property

## Overloads

| [IsOneAndOnlyOne](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxTreeDimensionInfo.IsOneAndOnlyOne.htm#Qlik_Engine_NxTreeDimensionInfo_IsOneAndOnlyOne) |  | If set to true, it means that the field always has one and only one selected value.<br><br>JSON property name: qIsOneAndOnlyOne |
| --- | --- | --- |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxTreeDimensionInfo.IsOneAndOnlyOne.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Engine.NxTreeDimensionInfo.IsOneAndOnlyOne.htm)

## IsOneAndOnlyOne

If set to true, it means that the field always has one and only one selected value.

JSON property name: qIsOneAndOnlyOne

### Declaration

```

          public bool IsOneAndOnlyOne { get; set; }
    
  
```

### Property Value

| Type | Description |
| --- | --- |
| System.Boolean |  |

### Implements

[INxTreeDimensionInfo.IsOneAndOnlyOne](https://help.qlik.com/en-US/sense-developer/November2024/Subsystems/NetSDKAPIref/Content/Qlik.Engine.INxTreeDimensionInfo.IsOneAndOnlyOne.htm#Qlik_Engine_INxTreeDimensionInfo_IsOneAndOnlyOne)