Program to illustrate the application of Multicast delegates

using System;
delegate void MDelegate();
class DM
{
 static public void Display()

Program to illustrate how an array of delegate object is created and used in a program (Singlecast delegate)

using System;
delegate int ArithOp(int x,int y);
class MathOperation
{
 public static int Add(int a,int b)
 {
  return a+b;
 }

Program to illustrate how a delegate is created and used in a program (Single-cast delegate)

using System;
delegate int ArithOp(int x,int y);
class MathOperation
{
 public static int Add(int a,int b)
 {
  return a+b;

Another program to illustrate the use of explicit interface implementation

using System;
class ExplicitInterface
{
 interface readFile
 {
  void Read();
  void Write();
 }

Program to show the inheritance using abstract class

using System;
class Program
{
 static void Main()
 {
  ABS[] aArray = new ABS[3];

Program to illustrate the use of explicit interface implementation

using System;
interface I1
{
 void Display();
}
interface I2

Program for inheriting a class that implements an interface

using System;
interface Display
{
 void Print();
}
class B : Display
{
 public void Print()

Program for multiple implimentation of an interface

using System;
interface Area
{
 double Compute(double x);
}
class Square : Area
{
 public double Compute(double x){ return x*x; }

Program for Implementation of multiple interface

using System;
interface Addition { int Add(); }
interface Multiplication { int Mul(); }
class Computation : Addition , Multiplication
{
 int x,y;
 public Computation(int x,int y)
 {

Program to implementing a property in C sharp.

using System;
class Number
{
 int number;
 public int Anumber

Program to show the upcasting of an object of Derived class to an object of its base class

using System;
class Maruti
{
 public virtual void Display()
 {

Program of hierarchical inheritance and function overriding

using System;
class BaseClass
{
 public int num1,num2,num3;
 public virtual int function1()
 {

Program to show the use of sealed keyword on methods in inheritance and overriding

using System;
class GrandParent
{
 private string clname;
 public GrandParent(){}

Program to show the use of sealed keyword for class in inheritance and overriding

using System;
sealed class GrandParent
{
 public void Show()
 {
  Console.WriteLine("GrandParent Class Method");

Program to show the use of abstract keyword in Inheritance

using System;
abstract class Base
{
 public Base()
 {
  Console.WriteLine("Welcome in Base Class");

Program to demonstrate the use of virtual and override keyword

using System;
class GrandParent
{
 public virtual void Display()
 {

The length & breadth of a rectangle and radius of a circle are input through the keyboard. Write a program to calculate the area & perimeter of the rectangle, and the area & circumference of the circle.

using System;
class Program5
{
 public static void Main()
 {
  double l,b,r,A_r,P_r,A_c,C_c;
 Console.Write("Enter length and breadth of a rectangle in cm\n");

Program to demonstrate the use of alias in C#

using print=System.Console;
class A
{
 int b;
 void Sum(int x)

Program of displaying the ASCII values and its characters between 0 to 218

class Program
{
    static void Main()

Program for Programming Language Knowledge Test of C language in multiple choice

using System;
using System.Runtime.InteropServices;
class Test
{
 [DllImport ("msvcrt")]
 static extern char _getch();
static void Main()
{
 char c;
 Console.Write("This is your Programming Language Knowledge Test of C, developed in C# console application by The \"Amit Ranjan\".\n");
 Console.Write("There are 20 multiple Choice Question of 5 marks each.\n");