Encrypt and Decrypt password using C#

using System.Security.Cryptography;


 private string Encrypt(string clearText)
    {
        string strmsg = string.Empty;
        byte[] encode = new byte[clearText.Length];
        encode = Encoding.UTF8.GetBytes(clearText);
        strmsg = Convert.ToBase64String(encode);
        return strmsg;
    }

    private string Decrypt(string cipherText)
    {
        string decryptpwd = string.Empty;
        UTF8Encoding encodepwd = new UTF8Encoding();
        Decoder Decode = encodepwd.GetDecoder();
        byte[] todecode_byte = Convert.FromBase64String(cipherText);
        int charCount = Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
        char[] decoded_char = new char[charCount];
        Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
        decryptpwd = new String(decoded_char);
        return decryptpwd;
    }