Автозаряд и авторазряд will do well.

charger-gui/Logger.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace charger_gui
+{
+	class Logger
+	{
+		private string fileName;
+
+		public Logger(string fileName)
+		{
+			this.fileName = fileName;
+		}
+
+		public void Log(string s)
+		{
+			var toLog = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + " " + s + "\n";
+			File.AppendAllText(fileName, toLog);
+		}
+	}
+}