# IOpcApplication Members
> Reference: Defines an application which runs an OPC UA client or server (see OpcApplication).
- Type
- IOpcApplication
- Namespace
- Opc.UaFx
- Assembly
- Opc.UaFx.Advanced.dll
- Package
- Opc.UaFx.Advanced v2.59.0
- Also in
- Opc.UaFx.Client
## Properties
### Configuration
Gets the configuration of the application.
```csharp
OpcApplicationConfiguration Configuration { get; }
```
```vbnet
ReadOnly Property Configuration As OpcApplicationConfiguration
```
**Property value**
[OpcApplicationConfiguration](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcapplicationconfiguration/)
The [OpcApplicationConfiguration](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcapplicationconfiguration/) of the application.
### ProductCompany
Gets the name of the company of the product the application belongs to.
```csharp
string ProductCompany { get; }
```
```vbnet
ReadOnly Property ProductCompany As String
```
**Property value**
[String](https://learn.microsoft.com/dotnet/api/system.string)
The name of the company.
### ProductName
Gets the name of the product the application belongs to.
```csharp
string ProductName { get; }
```
```vbnet
ReadOnly Property ProductName As String
```
**Property value**
[String](https://learn.microsoft.com/dotnet/api/system.string)
The name of the product.
### ProductVersion
Gets the version of the product the application belongs to.
```csharp
Version ProductVersion { get; }
```
```vbnet
ReadOnly Property ProductVersion As Version
```
**Property value**
[Version](https://learn.microsoft.com/dotnet/api/system.version)
The version of the product.
## Methods
### Exit
Exits the application.
```csharp
void Exit()
```
```vbnet
Sub [Exit]()
```
### Run
Runs the application.
```csharp
void Run()
```
```vbnet
Sub Run()
```
## Events
### Exited
Occurs after the application has been exited.
```csharp
event EventHandler Exited
```
```vbnet
Event Exited As EventHandler
```
**Event type**
[EventHandler](https://learn.microsoft.com/dotnet/api/system.eventhandler)
### Exiting
Occurs when the application is being exited.
```csharp
event EventHandler Exiting
```
```vbnet
Event Exiting As EventHandler
```
**Event type**
[EventHandler](https://learn.microsoft.com/dotnet/api/system.eventhandler)
### Started
Occurs after the application has been started.
```csharp
event EventHandler Started
```
```vbnet
Event Started As EventHandler
```
**Event type**
[EventHandler](https://learn.microsoft.com/dotnet/api/system.eventhandler)
### Starting
Occurs when the application is being started.
```csharp
event EventHandler Starting
```
```vbnet
Event Starting As EventHandler
```
**Event type**
[EventHandler](https://learn.microsoft.com/dotnet/api/system.eventhandler)