# FieldSelectionObserverDef Constructor

## Overloads

| [FieldSelectionObserverDef()](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Sense.Client.FieldSelectionObserverDef.-ctor.htm#Qlik_Sense_Client_FieldSelectionObserverDef__ctor) |  | Creates an instance of the FieldSelectionObserverDef class |
| --- | --- | --- |

[](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Sense.Client.FieldSelectionObserverDef.-ctor.htm) [](https://help.qlik.com/en-US/sense-developer/Subsystems/NetSDKAPIref/Content/Qlik.Sense.Client.FieldSelectionObserverDef.-ctor.htm)

## FieldSelectionObserverDef()

Creates an instance of the FieldSelectionObserverDef class

### Declaration

```

          public FieldSelectionObserverDef()
    
  
```