# AppIdentifier Class

Namespace: [Qlik.Engine](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.htm)  
Assembly: Qlik.Engine.dll

Token to identify a unique Qlik Sense app

## Inheritance

* System.Object
  * AppIdentifier

## Syntax

```
public class AppIdentifier : IAppIdentifier
```

## Constructors

| Name | Description |
| --- | --- |
| [AppIdentifier()](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.-ctor.htm#Qlik_Engine_AppIdentifier__ctor) | Default constructor |
| [AppIdentifier(String)](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.-ctor.htm#Qlik_Engine_AppIdentifier__ctor_System_String_) | Create AppIdentifier instance with only AppId property set. |

## Properties

| Name | Description |
| --- | --- |
| [AppId](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.AppId.htm#Qlik_Engine_AppIdentifier_AppId) | The machine-readable id of the app |
| [AppName](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.AppName.htm#Qlik_Engine_AppIdentifier_AppName) | The human-readable name of the app |
| [ConnectedUsers](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.ConnectedUsers.htm#Qlik_Engine_AppIdentifier_ConnectedUsers) | Number of connected users |
| [FileSize](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.FileSize.htm#Qlik_Engine_AppIdentifier_FileSize) | The application file size on disk |
| [FileTime](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.FileTime.htm#Qlik_Engine_AppIdentifier_FileTime) | The application file time |
| [LastReloadTime](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.LastReloadTime.htm#Qlik_Engine_AppIdentifier_LastReloadTime) | Last reloaded time |
| [Meta](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.Meta.htm#Qlik_Engine_AppIdentifier_Meta) | Meta information about the application |
| [Thumbnail](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.Thumbnail.htm#Qlik_Engine_AppIdentifier_Thumbnail) | Thumbnail for the application |
| [Title](https://help.qlik.com/en-US/sense-developer/May2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.AppIdentifier.Title.htm#Qlik_Engine_AppIdentifier_Title) | Title for the application |