/// <summary>
 /// Create new data holder and calculator object per session
 /// </summary>
 public void InitializeConnection()
 {
     data = new DataHolderImpl();
     calc = new CalculatorFunctionsImpl();
     Console.WriteLine("A new connection");
 }
 public WCFCalculatorImpl(IDataHolder <double> data, ICalculatorFunctions calc)
 {
     this.data = data;
     this.calc = calc;
 }