Prog to start a difftool and remap the files as they are deleted by git in order to open all files at once

app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <appSettings>
        <add key="Toolpath" value="c:\tools\bc3\bcomp.exe" />
        <add key="RemoteDir" value="c:\users\foo\Desktop\compare" />
    </appSettings>
</configuration>

Program.cs

using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;

namespace DifftoolStarter
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                EnsureCompareDir();

                if (File.Exists(args[0]))
                    File.Copy(args[0], args[0] = CreateDestinationFile(args[0], "left"));
                
                if (File.Exists(args[1])) 
                    File.Copy(args[1], args[1] = CreateDestinationFile(args[1], "right"));

                var toolPath = ConfigurationManager.AppSettings["Toolpath"];
                Process.Start(new ProcessStartInfo(toolPath, string.Join(" ", args)));
            }
            catch (Exception x)
            {
                var ex = x;
                while (ex != null)
                {
                    Console.WriteLine(x.GetType().Name);
                    Console.WriteLine(x.Message);
                    Console.WriteLine(x.StackTrace);
                    ex = x.InnerException;
                }
                Console.ReadLine();
            }
        }

        private static string CreateDestinationFile(string file, string subDir)
        {
            var dir = ConfigurationManager.AppSettings["RemoteDir"];
            return Path.Combine(dir, subDir, Path.GetFileName(file));
        }

        private static void EnsureCompareDir()
        {
            var dir = ConfigurationManager.AppSettings["RemoteDir"];
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
                Directory.CreateDirectory(Path.Combine(dir, "left"));
                Directory.CreateDirectory(Path.Combine(dir, "right"));
            }

        }
    }
}