Encryption procedures

protected byte[] EncryptKey = ASCIIEncoding.ASCII.GetBytes("ask_us_for_key");
public string DESEncrypt(string inString)
{
    MemoryStream ms = new MemoryStream();
    CryptoStream cs = new CryptoStream(ms, new DESCryptoServiceProvider().CreateEncryptor(EncryptKey, EncryptKey), CryptoStreamMode.Write);
    StreamWriter sw = new StreamWriter(cs);
    sw.Write(inString);
    sw.Flush();
    cs.FlushFinalBlock();
    sw.Flush();
    return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
}
public string DESDecrypt(string inString)
{
    try
    {
        return new StreamReader(new CryptoStream(new MemoryStream( Convert.FromBase64String(inString)), new DESCryptoServiceProvider().CreateDecryptor(EncryptKey, EncryptKey), CryptoStreamMode.Read)).ReadToEnd();
    }
    catch
    {
    }
    return "";
}