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The using directive

You learned earlier that one of the benefits of the using directive is to eliminate the requirement to always type the namespace (such as System ) when referring to a class that belongs to that namespace. That is the purpose of the using directive at the top of Listing 2 .

However, there is another benefit that derives from the using directive that may be more important.

Memory management

One of the big issues in game programming (or any kind of programming that makes use of graphics files, sound files, or other large resource files) is tomake certain that the memory occupied by those resources is freed up as soon as the resource is no longer needed.

Without going into a lot of detail, the use of the using keyword inside the Main method in Listing 2 will assure that the Dispose method is called to free up all of the memory occupied by the Game1 object when control reaches the closing curly brace following the using keyword.

Don't modify the file named Program.cs

As an XNA game programmer, you shouldn't normally have any reason to modify the contents of the file named Program.cs . We need to leave it alone and modify the file named Game1.cs instead.

The Game1 class

I told you earlier that when you create a new Windows Game project, the file named Game1.cs is opened in the editor pane. Listing 3 shows the contents of that file.

Listing 3 . Initial contents of the file named Game1.cs.

using System; using System.Collections.Generic;using System.Linq; using Microsoft.Xna.Framework;using Microsoft.Xna.Framework.Audio; using Microsoft.Xna.Framework.Content;using Microsoft.Xna.Framework.GamerServices; using Microsoft.Xna.Framework.Graphics;using Microsoft.Xna.Framework.Input; using Microsoft.Xna.Framework.Media;namespace WindowsGame2 {///<summary>/// This is the main type for your game ///</summary>public class Game1 : Microsoft.Xna.Framework.Game {GraphicsDeviceManager graphics; SpriteBatch spriteBatch;public Game1() {graphics = new GraphicsDeviceManager(this); Content.RootDirectory = "Content";} ///<summary>/// Allows the game to perform any initialization/// it needs to before starting to run. /// This is where it can query for any required/// services and load any non-graphic /// related content. Calling base.Initialize/// will enumerate through any components /// and initialize them as well.///</summary>protected override void Initialize() {// TODO: Add your initialization logic here base.Initialize();} ///<summary>/// LoadContent will be called once per game and is the place to load /// all of your content.///</summary>protected override void LoadContent() {// Create a new SpriteBatch, which can be used to draw textures. spriteBatch = new SpriteBatch(GraphicsDevice);// TODO: use this.Content to load your game content here }///<summary>/// UnloadContent will be called once per game and is the place to unload /// all content.///</summary>protected override void UnloadContent() {// TODO: Unload any non ContentManager content here }///<summary>/// Allows the game to run logic such as updating the world, /// checking for collisions, gathering input, and playing audio.///</summary>///<param name="gameTime">Provides a snapshot of timing values.</param>protected override void Update(GameTime gameTime) {// Allows the game to exit if(GamePad.GetState(PlayerIndex.One).Buttons.Back==ButtonState.Pressed)this.Exit(); // TODO: Add your update logic herebase.Update(gameTime); }///<summary>/// This is called when the game should draw itself. ///</summary>///<param name="gameTime">Provides a snapshot of timing values.</param>protected override void Draw(GameTime gameTime) {GraphicsDevice.Clear(Color.CornflowerBlue); // TODO: Add your drawing code herebase.Draw(gameTime); }} }

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
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
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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