MD5 Hashing

SecurityUtils.cs

using System;
using System.IO;
using System.Security.Cryptography;

namespace Security
{
    public class SecurityUtils
    {
        public static string ComputeChecksum(string filePath)
        {
            using (var md5 = MD5.Create())
            {
                using (var stream = File.OpenRead(filePath))
                {
                    return Convert.ToBase64String(md5.ComputeHash(stream));
                }
            }
        }
    }
}