DeGiffer - Split a GIF into frames

/*
*  DeGiffer!
*  This programs splits a .gif file into its separate frames.
*  Created by Ichabod Clay  10-27-2014
*
*  Feel free to edit or play around with this to your heart's content.
*/

using System;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

namespace DeGiffer
{
    class MainClass
    {
        static void Main(string[] args)
        {
            if (args.Length < 1)
            {
                Console.WriteLine("Drag and drop the .gif file to be de-giffed onto this executable.");
                Console.WriteLine("Press any key to exit...");
                Console.ReadKey();
                return;
            }

            FileInfo curFile = new FileInfo(args[0]);

            if (!curFile.Exists)
            {
                Console.WriteLine("Input file does not exist.");
                Console.WriteLine("Press any key to exit...");
                Console.ReadKey();
                return;
            }

            if (curFile.Extension != ".gif")
            {
                Console.WriteLine("This is the de-giffer!");
                Console.WriteLine("You gotta use a gif in the de-giffer!");
                Console.WriteLine("Press any key to exit...");
                Console.ReadKey();
                return;
            }

            if (Helpers.IsDirWriteProtected(curFile.DirectoryName))
            {
                Console.WriteLine("The directory that the input file in is write protected.");
                Console.WriteLine("Please place the input file in a writeable directory and try again.");
                Console.WriteLine("Press any key to exit...");
                Console.ReadKey();
                return;
            }

            //If we got here, then we're good to go!

            DirectoryInfo workingDir = Directory.CreateDirectory(String.Format("{0}\\{1}_degif", curFile.DirectoryName, Path.GetFileNameWithoutExtension(curFile.FullName)));

            using (Bitmap bmp = new Bitmap(curFile.FullName))
            {
                int frameCount = bmp.GetFrameCount(FrameDimension.Time);
                int numDigits = Helpers.GetNumberOfDigits(frameCount); //this is just to help formatting the display.

                for (int i = 0; i < frameCount; i++)
                {
                    Helpers.WriteProcessingInfo(i, frameCount, numDigits);

                    bmp.SelectActiveFrame(FrameDimension.Time, i);
                    bmp.Save(String.Format("{0}\\{1}_{2}.jpg", workingDir.FullName, Path.GetFileNameWithoutExtension(curFile.FullName), (i + 1).ToString("D" + numDigits)), ImageFormat.Jpeg);
                }
            }

            Console.WriteLine("\r\nImage processed!");
            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
            return;
        }
    }

    static class Helpers
    {
        public static bool IsDirWriteProtected(string directory)
        {
            string tempFile = String.Format("{0}\\temp", directory);

            try
            {
                File.WriteAllBytes(tempFile, new byte[] { 0xFF, 0xFF, 0xFF, 0xFF });
            }
            catch (IOException)
            {
                if (File.Exists(tempFile))
                    File.Delete(tempFile);
                return true;
            }

            if (File.Exists(tempFile))
                File.Delete(tempFile);

            return false;
        }

        public static int GetNumberOfDigits(int input)
        {
            return input.ToString().Length;
        }

        public static void WriteProcessingInfo(int curFrame, int totalFrames, int numDigits)
        {
            if (curFrame == 0)
            {
                Console.Write("Processing frame {0} out of {1}.", (curFrame + 1).ToString("D" + numDigits.ToString()), totalFrames);
            }
            else
            {
                Console.CursorLeft = 17;
                Console.Write(new String(' ', numDigits));
                Console.CursorLeft = 17;
                Console.Write((curFrame + 1).ToString("D" + numDigits.ToString()));

                Console.CursorLeft = 26 + numDigits * 2;
            }
        }
    }
}