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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.)


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




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

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
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