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Simple logfile singleton in CSharp

using System;
using System.Text;
using System.IO;
 
namespace SomeNamespace
{
    sealed class SimpleLogger : IDisposable
    {
		/// <summary>
		/// Singleton instance
		/// </summary>
        private static readonly SimpleLogger _instance = new Logger();
        private readonly string _logFilePath;
        private readonly FileStream _logFileStream;
 
 
        public static SimpleLogger Instance
        {
            get { return _instance; }
        }
 
        private SimpleLogger()
        {
            _logFilePath = Program.ApplicationFolder + @"\bithub.log";
            _logFileStream = new FileStream(_logFilePath, FileMode.Append);
        }
 
        public void Dispose()
        {
            if (_logFileStream != null)
            {
                _logFileStream.Flush();
                _logFileStream.Close();
            }
        }
 
		/// <summary>
		/// Creates logfile entry in the following form: 01.01.1970 00:00 -:- MESSAGE
		/// </summary>
        public void WriteLine(string message)
        {
            message = DateTime.Now.ToString("g") + " -:- " + message + Environment.NewLine;
            Byte[] output = new UTF8Encoding(true).GetBytes(message);
            _logFileStream.Write(output, 0, output.Length);
            _logFileStream.Flush();
        }
    }
}
 

A simple logging class for creating logfiles. Implemented as a singleton pattern.

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