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Methods versus functions

Methods in C# are analogous to the functions defined inside a class in C++. However, they are called methods instead of functions in C#.

Definition of the Main method

The Main method in Listing 2 begins with the keyword static and ends with the comment "end Main".

The WriteLine method

As you may have guessed already, the call to the WriteLine method inside the Main method causes the WriteLine method's argument to be displayed on the system console.

The Console class

Console is the name of a static class in the System namespace. The significance of the class being static is that "You do not need to declare an instance of a static class in order to access its members." Therefore, as I mentioned earlier, this program doesn't purposely instantiate any new objects.

According to the documentation , the Console class "Represents the standard input, output, and error streams for console applications. This class cannot be inherited."

The System namespace

The System namespace actually belongs to the Microsoft .NET framework and the classes inthe namespace are available for use by several different programming languages that also belong to the framework such as C#, VB.NET, etc. (See the online .NET Framework Class Library here .)

Members of the Console class

The Console class has many members, about nineteen of which are overloaded versions of the method named WriteLine . (Method overloading means that the same method name can be used two or more times in the same scope as long as the argument list differs fromone version to the next.)

The version of the WriteLine method that is called in Listing 2 requires a string object as an incoming parameter. According to the documentation, the behavior of this version of the method is:

"Writes the specified string value, followed by the current line terminator, to the standard output stream."

The dot operator

Note the period that joins the name of the class and the name of the methodin Console.WriteLine . When used in this way, the period is often referred to as the dot operator . The dot operator is used in a variety of similar but different ways in C#. In this case, it tells the compilerto look in the Console class for a method named WriteLine that requires an incoming parameter of type string . (It is actually the type of parameter being passed to the method, string , that specifies which version of the WriteLine method will be executed.)

Namespaces

Briefly, namespaces provide a way to partition the class library and the new classes defined in a program so that it is possible to reference two classeswith the same name in the same scope as long as they are in different namespaces. Therefore, whenever you reference a class name in your code, youmust tell the compiler which namespace it resides in. This can be done in two ways. One way is to write the namespace in front of the class name joined by thedot operator as in

System.Console

or

Microsoft.Xna.Framework.Graphics.SpriteBatch

The "using" declaration

The second way to tell the compiler which namespace the class resides in is through the use of a "using" declaration.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
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