Add Custom Log Information to Log4Net

To add custom log information in Log4Net, you can achieve this by following these steps:

1. Create a custom log information class that can include fields such as timestamp, user ID, operation type, etc., which need to be recorded.

public class CustomLogInfo
{
    public DateTime Timestamp { get; set; }
    public string UserId { get; set; }
    public string Action { get; set; }
}

1. Define a custom layout pattern in the Log4Net configuration file to output custom log information to the log file.

<layout type="log4net.Layout.PatternLayout">
    <conversionPattern value="%date [%thread] %-5level %logger - %message %property{CustomInfo}%newline" />
</layout>

1. Use the GlobalContext.Properties property of Log4Net in your code to store and retrieve custom log information.

GlobalContext.Properties["CustomInfo"] = customLogInfo.ToString();
log.Info("Log message with custom info");

By following the above steps, you can add custom log messages in Log4Net and have them output to the log file.