C Sharp :Introduction

C# is  developed by microsoft and comes after C, C++, Java. It inherits the properties of C, C++, Java, VB. We can say C# is smart and intelligent sister of Java because it do work smartly in comprasion to Java. The basic concept of C# language are same as C, C++ to whom you have learnt in C, C++ tutorials. The advance concept of C# language are as :

Object

Object is representative of the class and is responsible for memory allocation of its data members and member functions.An object is a real world entity having attributes (data type) and behaviors (functions).

Class

Class is a data structure that contains data members (constants files, events), member function methods, properties, constructor, destructor, indexers and nested type.Basically :

1. It is a user defined data type.
2. It is a reference type.
3. Infact class is a tag or template for object.

Drawback of Class

Class does not allocate memory to its data members & member function itself.Basically memory is allocated through object of a class.Class can’t explore itself means it can not access its members itself, to access members of a class we use object of that class.

Example :

 // Namespace Declaration
using System; 
// helper class 
class ClassA 
{ 
string myString; 
// Constructor
public ClassA(string str) 
{ 
myString = str;
 } 
 // Instance Method 
 public void Show() 
 { 
 Console.WriteLine("{0}", myString);
 } 
 // Destructor 
 ~ClassA()
 { 
 // Some resource cleanup routines
 } 
} 
// Program start class 
class ClassProgram 
{ 
// Main begins program execution
public static void Main() 
{ 
// Instance of ClassA 
ClassA objA = new ClassA("Welcome to the world of C# language !!");
// Call ClassA method 
 objA.Show();
 } 
}