C# Logger类

using System;
using System.IO;

public enum LogLevel
{
    Debug,
    Info,
    Warning,
    Error,
    Fatal
}

public class Logger
{
    private string _logFilePath;
    private LogLevel _minLogLevel;

    public Logger(string logFilePath, LogLevel minLogLevel = LogLevel.Info)
    {
        _logFilePath = logFilePath;
        _minLogLevel = minLogLevel;
    }

    public void Log(LogLevel level, string message, Exception ex = null)
    {
        if (level < _minLogLevel)
        {
            return;
        }

        string logMessage = $"{DateTime.Now.ToString()} [{level}] - {message}";

        if (ex != null)
        {
            logMessage += $"\r\n{ex.ToString()}";
        }

        try
        {
            using (StreamWriter writer = File.AppendText(_logFilePath))
            {
                writer.WriteLine(logMessage);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"Failed to write to log file: {ex.Message}");
        }
    }

    public void Debug(string message, Exception ex = null)
    {
        Log(LogLevel.Debug, message, ex);
    }

    public void Info(string message, Exception ex = null)
    {
        Log(LogLevel.Info, message, ex);
    }

    public void Warning(string message, Exception ex = null)
    {
        Log(LogLevel.Warning, message, ex);
    }

    public void Error(string message, Exception ex = null)
    {
        Log(LogLevel.Error, message, ex);
    }

    public void Fatal(string message, Exception ex = null)
    {
        Log(LogLevel.Fatal, message, ex);
    }
}

Logger logger = new Logger("C:\\mylog.txt");
logger.Debug("Debug message");
logger.Info("Info message");
logger.Warning("Warning message");
logger.Error("Error message", new Exception("Something went wrong"));
logger.Fatal("Fatal message", new Exception("Something really went wrong"));