QuickStart C#
Learning to Program in C#
Amy Roberge & John Linehan
November 7, 2005
Applied Computing Technology Laboratory
The C# Programming Language

Developed in 2000
 Created by Microsoft as part of their .NET platform to
unite programming languages for web based usage
 Microsoft chose the chief programmer of Delphi,
Anders Hejlsberg, to lead the development of C#
 Based on C++ and Java. More of an extension of
existing languages than a new one.
 The name C# is supposed to be a progression of C++
and the # contains four + symbols
 .NET is proprietary. Mono is an open source project
led by Novell to make a compatible set of .NET tools
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C# vs. Java


Similarities


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Require a virtual
machine
Similar syntax
Automatic garbage
collection
Object oriented
Large class library
C# over Java



Allows “structs”
Switch statements can
be applied to strings
(vs. characters or
numbers)
Support for output
parameters, allowing
multiple values to be
returned
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C# Advantages
Only allows single inheritance, but can
implement any number of interfaces
 Provides a balance of C++, rapid
development, Visual Basic, Delphi, and
Java
 Automatic garbage collection

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C# Disadvantages

Requires the .NET Runtime Environment
to run

More overhead
Doesn’t have true multiple inheritance
 “Unsafe code” is required to manage
memory directly and can be very
complex and difficult to debug

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C# Specification

Available from MSDN (Microsoft Developer Network):
http://msdn.microsoft.com/vcsharp/programming/language/
Current as of 3/2005, C# 2.0
Explains:



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

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Grammar
Structure
Generics
Types, values, variables, iterators
Type conversions and promotions
Classes, methods
Arrays, exceptions, execution, blocks, statements,
expressions, declarations, interfaces, arguments
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C# Grammar

Available on MSDN web site
http://msdn.microsoft.com/library/default.asp?url=/library/enus/csspec/html/vclrfcsharpspec_c.asp

Example:
Type:
Identifier [TypeArguments]{ . Identifier [TypeArguments]} {[]}
BasicType
TypeArguments:
< TypeArgument {, TypeArgument} >
TypeArgument:
Type ? [( extends | super ) Type]
Identifier:
IDENTIFIER
BasicType:
byte | short | char | int | long | float | double | boolean
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Reserved Words
abstract
as
base
bool
break
byte
case
catch
char
checked
class
const
continue
decimal
default
delegate
do
double
else
enum
event
explicit
extern
false
finally
fixed
float
for
foreach
goto
if
implicit
in
int
interface
internal
is
lock
long
namespace
new
null
object
operator
out
override
params
private
protected
public
readonly
ref
return
sbyte
sealed
short
sizeof
stackalloc
static
string
struct
switch
this
throw
true
try
typeof
uint
ulong
unchecked
unsafe
ushort
using
virtual
void
volatile
while
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Step 1: Getting Started

Download & install .NET Framework
SDK 1.1:
http://www.microsoft.com/downloads/details.aspx?familyid=9b3a2ca6-3647-40709f41-a333c6b9181d&displaylang=en
Double-click on file to run installer
 Follow all the defaults

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Step 2: SharpDevelop
Opensource IDE
 Download & install SharpDevelop from:

http://www.icsha`rpcode.net/OpenSource/SD/Download/

Run the installation and launch
SharpDevelop
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Step 3: Write a simple program
File->New->Combine
 Select “C#” category and new Console
Application template and click Create
 Name project “Hello World”
 SharpDevelop recognizes the Hello
World name and automatically produces
the code

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Hello World
using System;
namespace Hello_World
{
class MainClass
{
public static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
}
}
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Step 4: Run the program
Click Build
 Select Build Combine
 View the console at the bottom for
progress
 After the file is compiled, select Debug
and then click Run.
 Watch the command prompt window
open and display the output
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Learning more about C#

Visit the QuickStart Languages web site
http://actlab.csc.villanova.edu/quickstart
 Visit C# Station
http://www.csharp-station.com/

Visit the Microsoft Developer Center
http://msdn.microsoft.com/vcsharp/

Find Helpful C# tools
http://msdn.microsoft.com/vcsharp/programming/tools/

Wikipedia
http://en.wikipedia.org/wiki/C_Sharp
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