Introduction of c# day3

All Right Reserved@ aumcp group of annamalai university(Arun Singh)
Introduction of C#
Presented By
Arun Kumar Singh &Team
Master of Computer Application
Microsoft® Certified Professional
MCP id- 7802107
arunsingh026@hotmail.com
1
www.microsoft.mcp.com
7/30/20131

WHAT IS C#?
• C# (pronounced as ‘c sharp’) is a new computer programming language developed by
Microsoft Corporation,USA.
• C# is fully object oriented language like JAVA and is the first component-oriented
language
• Its development team is led by Anders Hejlsberg.
• It is a simple ,efficient language derived from the popular c and c++.
• Major parts of .NET framework is actually coded by C#
• The most recent version is C# 5.0, which was released on August 15, 2012.
• It is only component –oriented language available today.
• C# is combines with the best features of visual basic , C++, and java.
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HISTORY …………………
• During the development of the .NET Framework, the class libraries were originally
written using a managed code compiler system called Simple Managed C (SMC)
• In January 1999,Anders Hejlsberg formed a team to build a new language at the time
called Cool, which stood for "C-like Object Oriented Language".
• Microsoft had considered keeping the name "Cool" as the final name of the language,
but chose not to do so for trademark reasons.
• By the time the .NET project was publicly announced at the July 2000 Professional
Developers Conference, (MCP conference) the language had been renamed C#, and the
class libraries and ASP.NET runtime had been ported to C#.
• James Gosling, who created the Java programming language in 1994, and Bill Joy, a co-
founder of Sun Microsystems, the originator of Java, called C# an "imitation" of Java;
Gosling further claimed that "[C# is] sort of Java with reliability, productivity and
security. Klaus Kraft and Angelika Langer (authors of a C++ streams book) stated in a
blog post that "Java and C# are almost identical programming languages. Hardly
anybody will claim that Java or C# are revolutionary programming languages that
changed the way we write programs," and "C# borrowed a lot from Java - and vice versa.
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• Now that C# supports boxing and unboxing, we'll have a very similar feature in
Java.Anders Hejlsberg has argued that C# is "not a Java clone" and is "much closer to
C++" in its design.
Versions:
C# 1.0 January 2002 .NET Framework 1.0 Visual Studio .NET 2002
C# 1.2 April 2003 .NET Framework 1.1 Visual Studio .NET 2003
C# 2.0 November 2005 .NET Framework 2.0 Visual Studio 2005
.NET Framework 2.0 Visual Studio 2008
C# 3.0 November 2007 .NET Framework 3.0 Visual Studio 2010
.NET Framework 3.5
C# 4.0 April 2010 .NET Framework 4 Visual Studio 2010
C# 5.0 August 2012 .NET Framework 4.5 Visual Studio 2012
. 7/30/2013
All Right Reserved@ aumcp group of annamalai university(Arun Singh)4

EVOLUTION OF C#
C
C++
JAVA C# VB
Component
orientation
concept
ProductivityElegance
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HOW DOES C# DIFFER FROM C++?
• As stated earlier, c# was derived from c++ to make it the language of choice for c and c++
Programmers.
• C# therefore shares major parts of syntax with c++.however , the c# designer introduce a
few changes in the syntax of C++ and removed a few features primarily to reduce the
common pitfalls that occurred in c++ program development.
• They also added a number of additional features to make C# a type safe and web enabled
language.
C++ features:
1. Macros
2. Multiple Inheritance
3. Templates
4. Pointers
5. GlobalVariable
6. Typedef statement
7. Default arguments
8. Constant member function or
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Enhancement to C#.......
1. Automatic garbage collection
2. Version Support
3. Strict type safety
4. Properties to access data members
5. Delegates and events
6. Web services
and much more……………………
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HOW DOES C# DIFFER FROM JAVA?
• Like c# ,JAVA was also derived from C++ and therefore they have similar roots.
Moreover, c# was developed by Microsoft as an alternative to java for web programming
.
• C# borrowed many goods features from JAVA, which has already become a popular
internet language.
• However, there exist a number of difference b/w c# and JAVA.
1. c# has more primitive data types than java.
2. Arrays are declared differtly in c# than java.
3. C# provides better versioning supports than java.
4. C# adds internal a new accessibility modifiers.
5. There is no labeled break statements in c#. The goto is used to achieve this
And much more…………
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MY FIRST C# HELLO PROGRAM
using System;
class Samplefirst
{
public static void Main(string[] args)
{
Console.WriteLine("hello c#, i feeling great being with u");
}
}
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USING:
The using keyboard are allowed to us to use the various classes and interface etc.
Which are define in respective Namespace.
EX--- using System; //default Namespace
System Console
(namespace) (class)
NOTE: using also contain a nested namespace.
using namespace1.namespace2;
a namespace2 which are define into a namespace1, so we define like that……………
EX---- using System.Collection;

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The Namespace keyword:
Namespace is nothing but a logical collection of related classes.
The basic namespace of c# is System namespace. Which are contain all general classes and
interfaces, Methods, which are generally used in a program.
EX--- Namespace Class
using System.Console.WriteLine();
keyword Methods
Class:
The c# program are allow to you to define a at least one class in your program, which
Are build the main function.

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Syntax
class <class-name>
{
main function()
{
// statements parts is there…………….
}
}

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The Main() Function:
public static void Main(string args[])
• This is one of the standard signatures of the c# program. This methods act as entry point
of your program
• C# starts its execution from first line of your program and go for a end point of main
method .
• The keyword public is an access modifiers that tells that c# complier that main method can
accessible by anyone
• static- The main methods are design as a static, Why it is –it will called by a CLR
without making any object .
• void - The main method does not return any values.
• string args[] – is a parameter list which are passed into a command line arguments. And
taking a value in form of string. This is optional, but in java it is necessary.
• NOTE: the c# always take a value in form of String.

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COMMENTS:
There are three kinds of comments, which are define into C#.
• Single line comment e.g. //
Similar in java
• Multi line comment e.g. /* */
• Documents /// but in java-> /**………….*/
class Program // here we define class
{
static void Main(string[] args)// this is main function
{/* there are stats in which in main function*/
Console.Write("hello c#");///lssjssdcks
///cksjcc
///cbkx
///xnx
///xdcjbs
}
}

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SOME IMPORTANTS FACTS:
• White spaces are ignored
EX- class Program
{
static void Main(string[] args)
{
Console.Write("hello c#");
}
}
• Do not need to save your program.
• This is not necessary that main method contain the arguments ‘(string args[])’. It is
optional parameter. But in java is necessary to define a arguments.
static void Main()
{
}

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MAIN RETURN A VALUE:
class sampletwo
{
static int Main(string[] args)
{
return 0;
}
NOTE: Another important aspect is the return type of Main().we have used void as the
return in earlier programs .Main() can also return a value if it is declare as int type instead of
void. When the return type in int, we must a return statement at the end of the method as
shown above program.
Return an integer type value to the system .the value return serve as the program termination
Status code

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QUESTION REVIEW:
1. State at least five most important highlights of c# language.
2. How the c# better than java?
3. C# is modern language. Comment?
4. State five features of c++ that have not been incorporated into c#.
5. Explain the CLR?
6. State the software engineering phases, why it is important?
7. Why c# is very popular state one technical reason?

Q &A Session
More Information PostYour Questions on
www.aumcp2013.jimdo.com
aumcp2013@live.com
7/30/201319

Thanks to All
7/30/201320

Introduction of c# day3

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