System.Diagnostics.TraceListener.WriteLine C# (CSharp) Method

        public virtual void WriteLine(object o)
        {
            if (Filter != null && !Filter.ShouldTrace(null, "", TraceEventType.Verbose, 0, null, null, o))
                return;

            WriteLine(o == null ? "" : o.ToString());
        }

		/// <summary>
		/// try, try, try... to move this file. tries for a predefined period, in case a very large file was copying, or times out
		/// note: blocks thread
		/// </summary>
		/// <param name="sourcePath">full path to source file</param>
		/// <param name="destinationPath">full path to destination file</param>
		/// <param name="logFile">log file to write to</param>
		/// <returns>true if file moved OK</returns>
		public static bool ResilientMoveFile (string sourcePath, string destinationPath, TraceListener logFile)
			{
			if (logFile != null)
				{
				logFile.WriteLine ("Moving file '" + sourcePath + "' to '" + destinationPath + "'");
				}

			// it may have been created, but might not be finished copying. need to wait until we can have accessto move it
			bool haveMoved = false;
			int tryCount = 0;
			DateTime timeStart = DateTime.Now;
			while (!haveMoved)
				{
				// try to get access for predefined period
				if (DateTime.Now - timeStart > TimeSpan.FromSeconds (EncoderFolderWatcherService.WatcherSettings.Default.retryFileCopyDurationSeconds))
					{
					throw new WatcherException ("  Failed to get access to '" + sourcePath + "' within established time period -- abandoning");
					}

				// try renaming file. if we dont have access we will get the IOException
				try
					{
					if (logFile != null)
						{
						logFile.WriteLine ("  Trying to get access to '" + sourcePath + "'");
						}

					File.Move (sourcePath, destinationPath);
					haveMoved = true;

					if (logFile != null)
						{
						logFile.WriteLine ("  Moved file '" + sourcePath + "' to '" + destinationPath + "'");
						}
					}
				catch (FileNotFoundException)
					{
					// source file moved underneath us (someone else claimed?)
					if (logFile != null)
						{
						logFile.WriteLine ("  file '" + sourcePath + "' moved from underneath us. This machine should not do the encode");
						}

					return false;
					}
				catch (IOException)
					{
					// did not have access. Wait a little                    
					if (logFile != null)
						{
						logFile.WriteLine ("  Could not get access to '" + sourcePath + "' ... sleeping 1 second before retrying (try " + (++tryCount) + ")");
						}

					Thread.Sleep (1000);
					}
				}

			return true;
			}