public void WorkingWithDefaultValues()
        {
            var workingWithMethodsAndParams = new WorkingWithMethodsAndParams();

            workingWithMethodsAndParams.DisplayWithOptionalParameters();

            workingWithMethodsAndParams.DisplayWithOptionalParameters(4);

            workingWithMethodsAndParams.DisplayWithOptionalParameters(2, "My message");
        }
        public void WorkingWithParams()
        {
            var workingWithMethodsAndParams = new WorkingWithMethodsAndParams();

            double average;

            average = workingWithMethodsAndParams.CalculateAverage(4.0, 3.2, 5.7, 64.22, 87.2);
            Console.WriteLine("Average of data is: {0}", average);

            double[] data = { 4.0, 3.2, 5.7 };
            average = workingWithMethodsAndParams.CalculateAverage(data);
            Console.WriteLine("Average of data is: {0}", average);
        }