HashHelper

public class HashHelper
    {
        public static string ToMd5(string value)
        {
            using (var crypto = MD5.Create())
            {
                string result = Hashing(value, crypto);
                return result;
            }
        }

        public static string ToSha1(string value)
        {
            using (var crypto = SHA1.Create())
            {
                string result = Hashing(value, crypto);
                return result;
            }
        }

        public static string ToSha256(string value)
        {
            using (var crypto = SHA256.Create())
            {
                string result = Hashing(value, crypto);
                return result;
            }
        }

        public static string ToSha384(string value)
        {
            using (var crypto = SHA384.Create())
            {
                string result = Hashing(value, crypto);
                return result;
            }
        }

        public static string ToSha512(string value)
        {
            using (var crypto = SHA512.Create())
            {
                string result = Hashing(value, crypto);
                return result;
            }
        }

        private static string Hashing(string value, HashAlgorithm crypto)
        {
            //將字串編碼成 UTF8 位元組陣列
            var bytes = Encoding.UTF8.GetBytes(value);

            //取得雜湊值位元組陣列
            var hash = crypto.ComputeHash(bytes);

            StringBuilder result = new StringBuilder();

            foreach (var item in hash)
            {
                result.Append(item.ToString("X2"));
            }

            return result.ToString();
        }
    }