> For the complete documentation index, see [llms.txt](https://docs.wisej.com/ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/ai/components/api/services/iloggerservice/wisej.ai.services.defaultloggerservice.md).

# DefaultLoggerService

Namespace: **Wisej.AI.Services**

Assembly: **Wisej.AI** (3.5.0.0)

Provides a default implementation of the [ILoggerService](/ai/components/api/services/iloggerservice.md) for logging messages and exceptions.

{% tabs %}
{% tab title="C#" %}

```csharp
public class DefaultLoggerService : ILoggerService
```

{% endtab %}

{% tab title="VB.NET" %}

```visual-basic
Public Class DefaultLoggerService
    Inherits ILoggerService
```

{% endtab %}
{% endtabs %}

This class implements the [ILoggerService](/ai/components/api/services/iloggerservice.md) interface, offering methods to log messages and exceptions at various trace levels.

## Constructors

### ![](/files/ptrKjmmRoQB76pvrIqh0) DefaultLoggerService()

Initializes a new instance of [DefaultLoggerService](https://docs.wisej.com/api?q=wisej.ai.services.defaultloggerservice).

## Methods

### ![](/files/ptrKjmmRoQB76pvrIqh0) Log(level, context, message, arguments)

Provides functionality to log messages at various trace levels.

| Parameter     | Type                                                                              | Description                                                                        |
| ------------- | --------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- |
| **level**     | [TraceLevel](https://docs.microsoft.com/dotnet/api/system.diagnostics.tracelevel) | The trace level at which the message should be logged.                             |
| **context**   | [String](https://docs.microsoft.com/dotnet/api/system.string)                     | A string representing the name of the class and the method that called the logger. |
| **message**   | [String](https://docs.microsoft.com/dotnet/api/system.string)                     | The message to be logged. This parameter supports composite formatting.            |
| **arguments** | [Object\[\]](https://docs.microsoft.com/dotnet/api/system.object)                 | An array of objects to format the message with. This parameter is optional.        |

This method allows for logging messages with different severity levels, facilitating the tracking of information, warnings, and errors. Depending on the *level* specified, the method will route the message to the appropriate logging method.\
The supported trace levels are:

* [Off](https://docs.microsoft.com/dotnet/api/system.diagnostics.tracelevel.off): No logging is performed.
* [Info](https://docs.microsoft.com/dotnet/api/system.diagnostics.tracelevel.info): Logs informational messages.
* [Error](https://docs.microsoft.com/dotnet/api/system.diagnostics.tracelevel.error): Logs error messages.
* [Warning](https://docs.microsoft.com/dotnet/api/system.diagnostics.tracelevel.warning): Logs warning messages.

Here is an example of how to use the [Log](#log-level-context-message-arguments) method:

```csharp

  Log(TraceLevel.Info, "Starting process with ID {0}", processId);
  Log(TraceLevel.Warning, "Disk space is low on drive {0}", driveName);
  Log(TraceLevel.Error, "Failed to connect to server. Error: {0}", errorMessage);

```

### ![](/files/ptrKjmmRoQB76pvrIqh0) Log(level, context, exception)

Logs an exception at a specified trace level.

| Parameter     | Type                                                                              | Description                                                                        |
| ------------- | --------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------- |
| **level**     | [TraceLevel](https://docs.microsoft.com/dotnet/api/system.diagnostics.tracelevel) | The trace level at which the exception should be logged.                           |
| **context**   | [String](https://docs.microsoft.com/dotnet/api/system.string)                     | A string representing the name of the class and the method that called the logger. |
| **exception** | [Exception](https://docs.microsoft.com/dotnet/api/system.exception)               | The exception to be logged.                                                        |

This method is designed to log exceptions, allowing for a structured approach to error handling and diagnostics. The *level* parameter determines the severity of the log entry.\
Example usage of the method:

```csharp

try
{
// Code that might throw an exception
}
catch (Exception ex)
{
Log(TraceLevel.Error, ex);
}

```

## Implements

| Name                                                            | Description                                                                                                                           |
| --------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |
| [ILoggerService](/ai/components/api/services/iloggerservice.md) | Defines a contract for logging services that support logging messages with a specified trace level and optional formatting arguments. |


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