Another Flexible ListView Control

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace Guide
{
	public class IO
	{
		public const int TempFileNameLength = 4;

		private static Random random = new Random();

		public static string CreateTempFile(string path, string ext)
		{
			string filePath;

			do
			{
				string fileName = CreateTempFileName(ext);
				filePath = Path.Combine(path, fileName);
			}
			while (File.Exists(filePath));

			return filePath;
		}

		public static string CreateTempFileName(string ext)
		{
			return RandomFileName(TempFileNameLength) + ext;
		}

		private static string RandomFileName(int nChars)
		{
			StringBuilder s = new StringBuilder();

			for (int i = 0; i < nChars; i++)
			{
				int k = random.Next(10 + 'Z' - 'A' + 1);

				if (0 <= k && k <= 9)
					s.Append((char)(k + '0'));
				else if (k <= 10 + 'Z' - 'A')
					s.Append((char)('A' + k - 10));
				else
					throw new Exception("Shouldn't be here");
			}

			return s.ToString();
		}

		public void RunProcess(string path, string arguments)
		{

		}
	}
}