How can I implement logging with encryption in C#?

How can I implement logging with encryption in C#?

You can use libraries like NLog or log4net for logging, and then encrypt the log files using AES encryption.

Can you show me a code example for that?

Sure! Here's a simple example using NLog and AES encryption:

using NLog;
using System.Security.Cryptography;
using System.Text;

public class Logger
{
    private static readonly NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

    public void LogEncryptedMessage(string message)
    {
        string encryptedMessage = Encrypt(message);
        logger.Info(encryptedMessage);
    }

    private string Encrypt(string plainText)
    {
        // AES encryption logic here
    }
}

What should I do to ensure the encryption key is secure?

You should store the encryption key in a secure location, such as Azure Key Vault or AWS Secrets Manager, and avoid hardcoding it in your application.