certreg.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography.X509Certificates;

namespace certreg {
    class Program {
        static void Main(string[] args) {
            if(args.Length == 0) {
                Console.WriteLine("Useage:\n\tcertreg path");
                return;
            }

            if(!Directory.Exists(args[0])) {
                Console.WriteLine("Cannot open \"" + args[0] + "\"");
                return;
            }

            X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
            store.Open(OpenFlags.ReadWrite);

            foreach(string filePath in Directory.EnumerateFiles(args[0], "*.pfx")) {
                string password = Path.GetFileNameWithoutExtension(filePath);     // Where cert password = filename
                X509Certificate2 cert = new X509Certificate2(filePath, password);
                store.Add(cert);

                Console.WriteLine(password);
            }

            store.Close();

        }
    }
}