[C#]流れるHello World!

Program.cs

using System;
using System.Collections.Generic;

class Program
{
	static void Main(string[] args)
	{
		var width = 30;
		var queue = QueueInit(width);

		string target = "Hello World!" + Interval();

		try
		{
			while (true)
			{
				foreach (var c in target)
				{
					Console.Write(Shift(queue, c.ToString()));
					Console.SetCursorPosition(0, Console.CursorTop);
					System.Threading.Thread.Sleep(100);
				}
			}
		}
		catch (Exception e)
		{
			Console.WriteLine();
			Console.WriteLine(e.Message);
			Console.ReadKey();
		}
	}

	static string Interval()
	{
		var interval = 10;

		var intervalStr = string.Empty;
		for (int i = 0; i < interval; i++)
		{
			intervalStr += " ";
		}

		return intervalStr;
	}

	static Queue<string> QueueInit(int size)
	{
		var strings = new Queue<string>();
		var initialStr = " ";
		for (int i = 0; i < size; i++)
		{
			strings.Enqueue(initialStr);
		}
		return strings;
	}

	static void FIFO(Queue<string> queue, string s)
	{
		queue.Dequeue();
		queue.Enqueue(s);
	}

	static string QueueToString(Queue<string> q)
	{
		var array = q.ToArray();
		return string.Join("", array);
	}

	static string Shift(Queue<string> queue, string s)
	{
		FIFO(queue, s);
		return QueueToString(queue);
	}
}