static void Main()
        {
            switch (InterfaceFunctions.ChooseSection <LINQSections>())
            {
            case LINQSections.Basics:
            {
                Basics.BasicLINQSyntax();
            }
            break;

            case LINQSections.MethodSyntax:
            {
                Methods.MethodLINQSyntax();
            }
            break;

            case LINQSections.LambdaExpressions:
            {
                LambdaExpressions.LambdaTests();
            }
            break;
            }
            Console.ReadLine();
        }