Dead simple C# logging without config file dependency.

Logger.cs

using System;
using System.IO;

 public class Logger
{
    private string LogFilePath { get; set; }
    private string FileExtension { get; set; }
    private string FilePrefix { get; set; }

    public Logger(string path, string filePrefix = "Log", string fileExtension = ".txt")
    {
        LogFilePath = path;
        FilePrefix = filePrefix;
        FileExtension = fileExtension;
    }

    public void Info(string message)
    {
        Write(string.Format("[INFO] {0}", message));
    }

    public void Warning(string message)
    {
        Write(string.Format("[WARNING] {0}", message));
    }

    public void Error(string message)
    {
        Write(string.Format("[ERROR] {0}", message));
    }

    public void NewLine()
    {
        Write(string.Empty, false);
    }

    private void Write(string message, bool usePrefix = true)
    {
        string formattedMessage = string.Format("<{0}> {1}", DateTime.Now.ToString("HH:mm:ss"), message);
        string filePath = string.Format("{0}{1}-{2}{3}", LogFilePath, FilePrefix, DateTime.Today.ToString("MM-dd-yyyy"), FileExtension);

        if(!usePrefix)
        {
            formattedMessage = message;
        }

        FileInfo fileInfo = new FileInfo(filePath);
        fileInfo.Directory.Create();

        using (TextWriter textWriter = File.AppendText(filePath))
        {
            textWriter.WriteLine(formattedMessage);
            textWriter.Close();
        }
    }
}