Рефакторинг

Log.cs

@@ -0,0 +1,24 @@
+namespace SendNotify
+{
+    internal class Log
+    {
+        public static void Logger(string str)
+        {
+            string outdir = Environment.CurrentDirectory + @"\logs\";
+            if (!Directory.Exists(outdir)) Directory.CreateDirectory(outdir);
+            string filename = $"{DateTime.Now.Day}_{DateTime.Now.Month}_{DateTime.Now.Year}_SendNotify";
+
+            foreach (FileInfo file in new DirectoryInfo(outdir).GetFiles())
+            {
+                if (Convert.ToDateTime(file.LastWriteTime) < DateTime.Now.AddDays(-30))
+                    file.Delete();
+            }
+
+            using (FileStream aFile = new FileStream($@"{outdir}\{filename}.log", FileMode.Append, FileAccess.Write))
+            using (StreamWriter sw = new StreamWriter(aFile))
+            {
+                sw.WriteLine(DateTime.Now + " - " + str);
+            }
+        }
+    }
+}