public class CryptographyProcessor
{
    public string CreateSalt(int size)
    {
        //Generate a cryptographic random number.
        RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
        byte[] buff = new byte[size];
        rng.GetBytes(buff);
        return Convert.ToBase64String(buff);
    }

    public string GenerateHash(string input, string salt)
    { 
        byte[] bytes = Encoding.UTF8.GetBytes(input + salt);
        SHA256Managed sHA256ManagedString = new SHA256Managed();
        byte[] hash = sHA256ManagedString.ComputeHash(bytes);
        return Convert.ToBase64String(hash);
    }

    public bool AreEqual(string plainTextInput, string hashedInput, string salt)
    {
        string newHashedPin = GenerateHash(plainTextInput, salt);
        return newHashedPin.Equals(hashedInput); 
    }
}