State_Exercise.cs

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using System;
 
namespace DesignPatternExamples_csharp
{
    internal class State_Exercise
    {
 
        void _State_DisplayText(string textToDisplay)
        {
            string[] lines = textToDisplay.Split('\n');
            int lineNumber = 1;
            foreach (string line in lines)
            {
                Console.WriteLine("    {0,2}) {1}", lineNumber, line);
                ++lineNumber;
            }
        }
 
        // ! [Using State in C#]
        public void Run()
        {
            Console.WriteLine();
            Console.WriteLine("State Exercise");
 
            StateContext_Class filterContext = new StateContext_Class();
            string textToFilter =
                "/*####################  Block Comment  #################################*/\n" +
                "//####################  Line Comment  ####################################\n" +
                "// A comment.  /* A nested comment */\n" +
                "\n" +
                "void State_Exercise() // An exercise in state machines\n" +
                "{\n" +
                "    char character = '\\\"';\n" +
                "    Console.WriteLine();\n" +
                "    Console.WriteLine(\"\\\"State\\\" /*Exercise*/\");\n" +
                "\n" +
                "    StateContext_Class filterContext = new StateContext_Class();\n" +
                "\n" +
                "    Console.WriteLine(\"\\t\\tDone. //(No, really)//\");\n" +
                "}";
 
            Console.WriteLine("  Text to filter:");
            _State_DisplayText(textToFilter);
 
            Console.WriteLine("  Filtering text...");
            string filteredText = filterContext.RemoveComments(textToFilter);
 
            Console.WriteLine("  Filtered text:");
            _State_DisplayText(filteredText);
 
            Console.WriteLine("  Done.");
        }
        // ! [Using State in C#]
    }
}