CalculatorHostApp.CalculatorForm.Calculate C# (CSharp) Метод

        public double Calculate(string operation, double number1, double number2)
        {
            //Find the plug-in according to operation
            foreach (var plugIn in _plugInManager.PlugIns)
            {
                if (plugIn.PlugInProxy.OperationSign == operation)
                {
                    //Calculate result using plug-in
                    return plugIn.PlugInProxy.DoOperation(number1, number2);
                }
            }

            throw new ApplicationException("Can not found any plug-in for operation " + operation);
        }