jpg2base64 base64toJpg

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

namespace ConsoleApplication {

    class Program
    {
        static void Main(string[] args)
        {
            if(args.Length == 0){

                if(File.Exists("pic.jpg")){ File.Delete("pic.jpg");}
                if(File.Exists("picstring.txt")){ File.Delete("picstring.txt");}

                Console.WriteLine("\n I want to:\n");
                Console.WriteLine("\tConvert (J)PG to Base64 string");
                Console.WriteLine("\tConvert (B)ase64 string to JPG");
                ConsoleKeyInfo ki = Console.ReadKey();

                if(ki.Key == ConsoleKey.J){
                    Console.WriteLine("\n We'll try to convert JPG to Base64 string...");
                    string converted = ImageToBase64(Image.FromFile(".\\temp\\pic.jpg"));
                    using(StreamWriter sw = new StreamWriter("picstring.txt")){
                        sw.Write(converted);
                    }
                }else{
                    if(ki.Key == ConsoleKey.B){
                        Console.WriteLine("\n We'll try to convert Base64 string to JPG...");
                        string data = string.Empty;
                        using(StreamReader sr = new StreamReader(".\\temp\\picstring.txt")){
                            data = sr.ReadToEnd();
                        }
                        Bitmap b = Base64ToBitmap(data);
                        b.Save("pic.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
                    }else{
                        Console.WriteLine("\n You didn't select a valid choice.");
                    }
                }
            }
        }

        private static bool EndsWithImageFileFormatExtension(string filepath){
            bool result = false;

            if(filepath.EndsWith(".png")){ result = true; }
            if(filepath.EndsWith(".jpg")){ result = true; }
            if(filepath.EndsWith(".jpeg")){ result = true; }
            if(filepath.EndsWith(".bmp")){ result = true; }

            return result;
        }

        private static string ImageToBase64(Image image)
        {
            try
            {
                var imageStream = new MemoryStream();
                image.Save(imageStream, System.Drawing.Imaging.ImageFormat.Bmp);
                imageStream.Position = 0;
                var imageBytes = imageStream.ToArray();
                var ImageBase64 = Convert.ToBase64String(imageBytes);
                return ImageBase64;
            }
            catch
            {
                return "Error converting image to base64!";
            }
        }

        private static Bitmap Base64ToBitmap(string ImageText)
        {
            Byte[] bitmapData = Convert.FromBase64String(FixBase64ForImage(ImageText));
            System.IO.MemoryStream streamBitmap = new System.IO.MemoryStream(bitmapData);
            Bitmap bitImage = new Bitmap((Bitmap)Image.FromStream(streamBitmap));
            return bitImage;
        }

        private static string FixBase64ForImage(string Image) {
            System.Text.StringBuilder sbText = new System.Text.StringBuilder(Image,Image.Length);
            sbText.Replace("\r\n", String.Empty); sbText.Replace(" ", String.Empty);
            return sbText.ToString();
        }

    }
}