/*
Learning C# 
by Jesse Liberty

Publisher: O'Reilly 
ISBN: 0596003765
*/
 using System;

 namespace Test_Console_App_3
 {

     // declare a Cat class
     // stripped down
     class Cat
     {
         // a private static member to keep
         // track of how many Cat objects have
         // been created
         private static int instances = 0;
         private int weight;
         private String name;

         // cat constructor
         // increments the count of Cats
         public Cat(String name, int weight)
         {
             instances++;
             this.name = name;
             this.weight = weight;
         }

         // Static method to retrieve
         // the current number of Cats
         public static void HowManyCats()
         {
             Console.WriteLine("{0} cats adopted",
                 instances);
         }
         public void TellWeight()
         {
             Console.WriteLine("{0} is {1} pounds",
                 name, weight);
         }
     }

    public class StaticInClassTester
    {
       public void Run()
       {
           Cat.HowManyCats();
           Cat frisky = new Cat("Frisky", 5);
           frisky.TellWeight();
           Cat.HowManyCats();
           Cat whiskers = new Cat("Whisky", 7);
           whiskers.TellWeight();
           Cat.HowManyCats();
       }

       static void Main()
       {
          StaticInClassTester t = new StaticInClassTester();
          t.Run();
       }
    }
 }

           
          

   

/*
Learning C# 
by Jesse Liberty

Publisher: O'Reilly 
ISBN: 0596003765
*/
 using System;

 public class MyTimeWithDefaultValue
 {
     // private member variables
     int year;
     int month;
     int date;
     int hour;
     int minute;
     int second = 30;

     // public method
     public void DisplayCurrentMyTimeWithDefaultValue()
     {
         System.Console.WriteLine("{0}/{1}/{2} {3}:{4}:{5}",
             month, date, year, hour, minute, second);
     }

     // constructor
     public MyTimeWithDefaultValue(int theYear, int theMonth, int theDate,
         int theHour, int theMinute)
     {
         year = theYear;
         month = theMonth;
         date = theDate;
         hour = theHour;
         minute = theMinute;
     }
 }

 public class Tester
 {
     static void Main()
     {
         MyTimeWithDefaultValue timeObject = new MyTimeWithDefaultValue(2005,3,25,9,35);
         timeObject.DisplayCurrentMyTimeWithDefaultValue();
     }
 }

           
          

   
 


public class Product {
    public string make;
    public string model;
    public string color;
    public int yearBuilt;

    public void Start() {
        System.Console.WriteLine(model + " started");
    }

    public void Stop() {
        System.Console.WriteLine(model + " stopped");
    }

}


class MainClass{

    public static void Main() {
        Product myProduct;

        myProduct = new Product();

        myProduct.make = "Toyota";
        myProduct.model = "MR2";
        myProduct.color = "black";
        myProduct.yearBuilt = 1995;

        System.Console.WriteLine("myProduct details:");
        System.Console.WriteLine("myProduct.make = " + myProduct.make);
        System.Console.WriteLine("myProduct.model = " + myProduct.model);
        System.Console.WriteLine("myProduct.color = " + myProduct.color);
        System.Console.WriteLine("myProduct.yearBuilt = " + myProduct.yearBuilt);

        myProduct.Start();
        myProduct.Stop();

        Product redPorsche = new Product();
        redPorsche.make = "Porsche";
        redPorsche.model = "Boxster";
        redPorsche.color = "red";
        redPorsche.yearBuilt = 2000;
        System.Console.WriteLine(          "redPorsche is a " + redPorsche.model);
        System.Console.WriteLine("Assigning redPorsche to myProduct");
        myProduct = redPorsche;
        System.Console.WriteLine("myProduct details:");
        System.Console.WriteLine("myProduct.make = " + myProduct.make);
        System.Console.WriteLine("myProduct.model = " + myProduct.model);
        System.Console.WriteLine("myProduct.color = " + myProduct.color);
        System.Console.WriteLine("myProduct.yearBuilt = " + myProduct.yearBuilt);
    }
}

    

   
 

using System;
using System.Reflection;

public enum RegHives {
    HKEY_CLASSES_ROOT,
    HKEY_CURRENT_USER,
    HKEY_LOCAL_MACHINE,
    HKEY_USERS,
    HKEY_CURRENT_CONFIG
}

public class RegKeyAttribute : Attribute {
    public RegKeyAttribute(RegHives Hive, String ValueName) {
        this.Hive = Hive;
        this.ValueName = ValueName;
    }

    protected RegHives hive;
    public RegHives Hive {
        get { return hive; }
        set { hive = value; }
    }

    protected String valueName;
    public String ValueName {
        get { return valueName; }
        set { valueName = value; }
    }
}

class SomeClass {
    [RegKey(RegHives.HKEY_CURRENT_USER, "Foo")]
    public int Foo;

    public int Bar;
}

class Test {
    [STAThread]
    static void Main(string[] args) {
        Type type = Type.GetType("FieldAttribs.SomeClass");
        foreach (FieldInfo field in type.GetFields()) {
            foreach (Attribute attr in
                field.GetCustomAttributes(true)) {
                RegKeyAttribute rka =
                    attr as RegKeyAttribute;
                if (null != rka) {
                    Console.WriteLine("{0} will be saved in {1}{2}", field.Name, rka.Hive, rka.ValueName);
                }
            }
        }
    }
}

    

using System;

public class MyString {
private string fString;

public MyString() {
fString = “”;
}
public MyString(string inStr) {
fString = inStr;
}
public string ToStr() {
return fString;
}
public string Right(int nChars) {
if (nChars > fString.Length)
return fString;

string s = “”;
for (int i = fString.Length – nChars; i < fString.Length; ++i) s += fString[i]; return s; } public string Left(int nChars) { if (nChars > fString.Length)
return fString;
string s = “”;
for (int i = 0; i < nChars; ++i) s += fString[i]; return s; } public string Mid(int nStart, int nEnd) { if (nStart < 0 || nEnd > fString.Length)
return fString;
if (nStart > nEnd)
return “”;

string s = “”;
for (int i = nStart; i < nEnd; ++i) s += fString[i]; return s; } } class Class1 { static void Main(string[] args) { MyString s = new MyString("Hello world"); System.Console.WriteLine("s = {0}", s.ToStr()); System.Console.WriteLine("Right 3 = [{0}]", s.Right(3)); System.Console.WriteLine("Left 6 = [{0}]", s.Left(6)); System.Console.WriteLine("Mid 2,4 = [{0}]", s.Mid(2, 4)); } } [/csharp]

   
 

using System;

public class Foo
{
    public int i;
}
   
class RefTest2App
{
    public static void ChangeValue(Foo f)
    {
        f.i = 42;
    }
   
    static void Main(string[] args)
    {
        Foo test = new Foo();
        test.i = 6;
   
        Console.WriteLine("BEFORE METHOD CALL");
        Console.WriteLine("test.i={0}", test.i);
        Console.WriteLine();
   
        ChangeValue(test);
   
        Console.WriteLine("AFTER METHOD CALL");
        Console.WriteLine("test.i={0}", test.i);
    }
}

    

   


using System;

public class MemberFunctions
{
    public static void Main()
    {
        Point myPoint = new Point(10, 15);
        Console.WriteLine("myPoint.X {0}", myPoint.GetX());
        Console.WriteLine("myPoint.Y {0}", myPoint.GetY());
    }
}
class Point
{
    public Point(int x, int y)
    {
        this.x = x;
        this.y = y;
    }
    
    // accessor functions
public int GetX() {return(x);}
public int GetY() {return(y);}
    
    // variables now private
    int x;
    int y;
}