Security C#

using System;
using System.Text;
    public enum HashType
    {
        SHA1,
        MD5,
        SHA256,
        SHA384,
        SHA512
    }
    public static class EncryptionUtils
    {
        public static string HashString(string clearText, HashType hashType)
        {
            var algorithm = System.Security.Cryptography.HashAlgorithm.Create(hashType.ToString());
            var encodedBytes = algorithm.ComputeHash(Encoding.Unicode.GetBytes(clearText));
            return Convert.ToBase64String(encodedBytes);
        }
    }
}