MD5, SHA1, SHA256 and SHA512 Hash Algorithm Functions in C#

using System;using System.Security.Cryptography;using System.Text;namespace Hash{    public class Hash    {        public Hash() { }        public enum HashType : int        {            MD5,            SHA1,            SHA256,            SHA512        }        public static string GetHash(string text, HashType hashType)        {            string hashString;            switch (hashType)            {                case HashType.MD5:                    hashString = GetMD5(text);                    break;                case HashType.SHA1:                    hashString = GetSHA1(text);                    break;                case HashType.SHA256:                    hashString = GetSHA256(text);                    break;                case HashType.SHA512:                    hashString = GetSHA512(text);                    break;                default:                    hashString = "Invalid Hash Type";                    break;            }            return hashString;        }        public static bool CheckHash(string original, string hashString, HashType hashType)        {            string originalHash = GetHash(original, hashType);            return (originalHash == hashString);        }        private static string GetMD5(string text)        {            UnicodeEncoding UE = new UnicodeEncoding();            byte[] hashValue;            byte[] message = UE.GetBytes(text);            MD5 hashString = new MD5CryptoServiceProvider();            string hex = "";            hashValue = hashString.ComputeHash(message);            foreach (byte x in hashValue)            {                hex += String.Format("{0:x2}", x);            }            return hex;        }        private static string GetSHA1(string text)        {            UnicodeEncoding UE = new UnicodeEncoding();            byte[] hashValue;            byte[] message = UE.GetBytes(text);            SHA1Managed hashString = new SHA1Managed();            string hex = "";            hashValue = hashString.ComputeHash(message);            foreach (byte x in hashValue)            {                hex += String.Format("{0:x2}", x);            }            return hex;        }        private static string GetSHA256(string text)        {            UnicodeEncoding UE = new UnicodeEncoding();            byte[] hashValue;            byte[] message = UE.GetBytes(text);            SHA256Managed hashString = new SHA256Managed();            string hex = "";            hashValue = hashString.ComputeHash(message);            foreach (byte x in hashValue)            {                hex += String.Format("{0:x2}", x);            }            return hex;        }        private static string GetSHA512(string text)        {            UnicodeEncoding UE = new UnicodeEncoding();            byte[] hashValue;            byte[] message = UE.GetBytes(text);            SHA512Managed hashString = new SHA512Managed();            string hex = "";            hashValue = hashString.ComputeHash(message);            foreach (byte x in hashValue)            {                hex += String.Format("{0:x2}", x);            }            return hex;        }    }}