DiscordImageCacheConverter

using System;
using System.IO;
using System.Threading.Tasks;
using System.Collections.Generic;

namespace DiscordCacheConverter
{
    class Program
    {

        static void Main(string[] args)
        {

            Console.WriteLine(@"WARNING: This executable must be placed in your \AppData\Roaming\discord\Cache directory");
            Console.WriteLine("This program will overwrite all files in current directory, so make sure it's in the right one. Close now if you are unsure.");
            Console.WriteLine("Press any key to continue");
            Console.ReadKey();
            Console.WriteLine("Starting Conversion of image cache to readable state...");
            Converter converter = new Converter();
        }
    }

    public class Converter
    {
        readonly string BasePath = AppDomain.CurrentDomain.BaseDirectory;
        string[] Files;
        public Converter()
        {
            Files = Directory.GetFiles(BasePath);
            Run();
        }

        private void Run()
        {
            foreach (string file in Files)
            {
                if (file.Contains("f_"))
                {
                    Console.WriteLine($"Found file {file}");
                    Console.WriteLine("Converting...");
                    File.Move(file, $"{file}.png");
                    Console.WriteLine("Completed Conversion");
                    Console.WriteLine($"File saved as {file}.png");
                }
            }
        }
    }
}