.NET (Core and Framework)

SerialPort s = new SerialPort("com3", 2400, Parity.None, 8, StopBits.One);<br />
try{<br />
s.Open();<br />
s.Write("atdt8889653");<br />
...<br />
}<br />
catch<br />
{<br />
...<br />
}

// Create a new CspParameters object that identifies a<br />
// Smart Card CryptoGraphic Provider.<br />
CspParameters csp = new CspParameters(1, "Datakey RSA CSP");<br />
csp.Flags = CspProviderFlags.UseDefaultKeyContainer;<br />
<br />
//password do token<br />
System.Security.SecureString pwd = new System.Security.SecureString();<br />
pwd.AppendChar('1'); pwd.AppendChar('2'); pwd.AppendChar('3'); pwd.AppendChar('4');<br />
csp.KeyPassword = pwd;<br />
<br />
csp.KeyNumber = (int)KeyNumber.Signature;<br />
<br />
// Initialize an RSACryptoServiceProvider object using<br />
// the CspParameters object.<br />
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(csp);<br />
<br />
// Create some data to sign.<br />
byte[] data = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7 };<br />
<br />
Console.WriteLine("Data         : " + BitConverter.ToString(data));<br />
<br />
// Sign the data using the Smart Card CryptoGraphic Provider.<br />
byte[] sig = rsa.SignData(data, "SHA1");<br />
<br />
Console.WriteLine("Signature    : " + BitConverter.ToString(sig));<br />
<br />
// Verify the data using the Smart Card CryptoGraphic Provider.<br />
bool verified = rsa.VerifyData(data, "SHA1", sig);<br />
<br />
Console.WriteLine("Verified     : " + verified);

static public byte[] SignMsg2(Byte[] msg, X509Certificate2 signerCert, bool detached)<br />
{<br />
    //  Place message in a ContentInfo object.<br />
    //  This is required to build a SignedCms object.<br />
    ContentInfo contentInfo = new ContentInfo(msg);<br />
<br />
    //  Instantiate SignedCms object with the ContentInfo above.<br />
    //  Has default SubjectIdentifierType IssuerAndSerialNumber.<br />
    SignedCms signedCms = new SignedCms(contentInfo, detached);<br />
<br />
<br />
    CspParameters csp = new CspParameters(1, "Datakey RSA CSP");<br />
    csp.Flags = CspProviderFlags.UseDefaultKeyContainer;<br />
<br />
<br />
    //password do token<br />
    System.Security.SecureString pwd = new System.Security.SecureString();<br />
    pwd.AppendChar('1'); pwd.AppendChar('2'); pwd.AppendChar('3'); pwd.AppendChar('4');<br />
    csp.KeyPassword = pwd;<br />
<br />
    csp.KeyNumber = (int)KeyNumber.Signature;<br />
    csp.Flags = CspProviderFlags.NoPrompt;      //no prompt for the pin!<br />
<br />
    //Formulate a CmsSigner object for the signer.<br />
    CmsSigner cmsSigner = new CmsSigner(csp);<br />
<br />
    // Include the following line if the top certificate in the<br />
    // smartcard is not in the trusted list.<br />
    cmsSigner.IncludeOption = X509IncludeOption.EndCertOnly;<br />
<br />
    //  Sign the CMS/PKCS #7 message. The second argument is<br />
    //  needed to ask for the pin.<br />
    signedCms.ComputeSignature(cmsSigner, false);<br />
<br />
    //  Encode the CMS/PKCS #7 message.<br />
    return signedCms.Encode();<br />
}

abstract class Order<br />
{<br />
        protected Custumer custumer;<br />
<br />
        protected DateTime deliveryDate;<br />
        protected DateTime returnDate;        <br />
        protected Office deliveryOffice;<br />
        protected Office returnOffice;<br />
        protected DateTime realReturnDate;<br />
        protected Office realReturnOffice;<br />
<br />
        protected IRentable rentableItem;<br />
        protected RentProgram rentProgram;<br />
<br />
        protected List<payment> payments;<br />
<br />
        protected double damageCost;<br />
        protected String damageComments;<br />
<br />
        protected bool isFiniliezed = false;<br />
<br />
	...<br />
}<br />
<br />
abstract class RentProgram<br />
{<br />
	public abstract double CalculateCost(Order order);<br />
	<br />
	...<br />
}<br />
<br />
class CarOrder : Order<br />
{<br />
        protected double kilometers;<br />
        protected bool isFuelTankFull;<br />
<br />
	...<br />
}<br />
<br />
class MotocycleOrder : Order<br />
{<br />
        protected double kilometers;     <br />
	protected bool isAlarmPresent;<br />
	...<br />
}<br />
<br />
<br />
class Car : IRentable<br />
{<br />
        protected int id;<br />
        protected CarClass carClass;<br />
        protected double kilometers;<br />
        protected String name; <br />
<br />
	...<br />
}<br />
<br />
class Motocycle : IRentable<br />
{<br />
        protected int id;    <br />
        protected String name;<br />
        protected double kilometers;<br />
<br />
	...<br />
}<br />
<br />
<br />
class CarRentProgram : RentProgram<br />
{           <br />
        protected CostDescriptor costPerKilometer;<br />
        protected CostDescriptor costPerTime;<br />
        protected double insuranceCost;<br />
        protected double fuelTankPenaltyCost;<br />
        protected double dropChargeCost;<br />
<br />
	...<br />
}<br />
<br />
class MotocycleRentProgram : RentProgram<br />
{<br />
        protected CostDescriptor costPerTime;<br />
	protected double gadgetsCost;<br />
	protected double alarmDeviceCost; <br />
<br />
	...<br />
}</payment>