# Qlik.Engine.Communication Namespace

## Classes

| [CertificateManager](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.CertificateManager.htm) | Class for retrieving Qlik Sense certificates. |
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| [CertificateManager.CertificatesNotFoundInStoreException](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.CertificateManager.CertificatesNotFoundInStoreException.htm) | An exception indicating that it has not been possible to access certain certificates in the certificate store. |
| [CommunicationErrorException](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.CommunicationErrorException.htm) | Exception thrown when an attempt to open a websocket connection fails. |
| [DebugConsole](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.DebugConsole.htm) | This is a convenience class for monitoring communication activity on the protocol level. |
| [ObjectsChangedEventArgs](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.ObjectsChangedEventArgs.htm) | Event triggered when an entity is changed on the server |
| [ObjectsClosedEventArgs](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.ObjectsClosedEventArgs.htm) | Event triggered when an entity is closed/destroyed on the server |
| [QlikConnection](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.QlikConnection.htm) | QlikConnection is responsible for handling the communication with a Qlik Sense instance |

## Interfaces

| [IQlikConnection](https://help.qlik.com/en-US/sense-developer/November2025/Subsystems/NetSDKAPIref/Content/Qlik.Engine.Communication.IQlikConnection.htm) | QlikConnection is responsible for handling the communication with a Qlik Sense instance |
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