using System;
using System.Security.Cryptography;
using System.Text;
static class GetHash
    {
        /// <summary>
        /// Aufzaehlung der
        /// Verschluesselungsmethoden
        /// </summary>
        public enum HASH
        {
            MD5 = 0,
            SHA1 = 1,
            SHA256 = 2,
            SHA384 = 3,
            SHA512 = 4
        }
 
        /// <summary>
        /// Liefert anhand des uebergebenen String
        /// und der entsprechenden VerschluesselungsMethode
        /// (MD5 = 0,SHA1 = 1,SHA256 = 2,SHA384 = 3,SHA512 = 4)
        /// den ermittelten HashWert
        /// </summary>
        /// <param name="_value">String</param>
        /// <param name="_hash">Enum</param>
        /// <returns>Hash</returns>
        public static String HashString(String _value, HASH _hash)
        {
            Byte[] bytes;
            var hashValue = new Byte[1];
            var sb = new StringBuilder();
 
            switch (_hash)
            {
                case HASH.MD5:
                    var MD5 = new MD5CryptoServiceProvider();
                    bytes = Encoding.ASCII.GetBytes(_value);
                    hashValue = MD5.ComputeHash(bytes);
                    break;
 
                case HASH.SHA1:
                    var SHA1 = new SHA1CryptoServiceProvider();
                    bytes = Encoding.ASCII.GetBytes(_value);
                    hashValue = SHA1.ComputeHash(bytes);
                    break;
 
                case HASH.SHA256:
                    var SHA256 = new SHA256CryptoServiceProvider();
                    bytes = Encoding.ASCII.GetBytes(_value);
                    hashValue = SHA256.ComputeHash(bytes);
                    break;
 
                case HASH.SHA384:
                    var SHA384 = new SHA384CryptoServiceProvider();
                    bytes = Encoding.ASCII.GetBytes(_value);
                    hashValue = SHA384.ComputeHash(bytes);
 
                    break;
                case HASH.SHA512:
                    var SHA512 = new SHA512CryptoServiceProvider();
                    bytes = Encoding.ASCII.GetBytes(_value);
                    hashValue = SHA512.ComputeHash(bytes);
                    break;
            }
 
            for (var i = 0; i <= hashValue.Length - 1; i++)
            {
                sb.Append(hashValue[i].ToString("X2"));
            }
 
            return sb.ToString();
        }
    }