1. Paul Stubbs MCSD, MCSE 4.0, MCP+I, MCT, MCAD .Net

2. Agenda Language Features Development Environment Performance
Total Cost of Ownership (TCO)

3. Hello World using System; class Hello { static void Main() {
Console.WriteLine("Hello world"); }

4. .Net Framework Common Language Specification VB C++ C# J# …
Visual Studio .NET
Base Class Library
ADO .NET and XML
ASP .NET
Web Forms Web Services
Mobile Internet Toolkit
Windows
Forms
Common Language Runtime
Operating System

5. Design Goals Component Oriented Everything is an Object
Properties, methods, events
Design-time and run-time attributes
Integrated documentation using XML
No header files, IDL, etc.
Everything is an Object

6. Design Goals Garbage Collection Versioning Exceptions Type Safe
No memory leaks
Versioning
Built into the framework
Exceptions
Baked into the language and framework
Type Safe
No unsafe casts

7. Design Goals Multi-Platform Rotor Mono Multi-Language Win32 , Win64
FreeBSD
Mono
GNU/Linux , Unix, Mac OS X, Solaris
Multi-Language
Over 20 languages supported

8. Interoperability No need to rewrite everything
Interop with COM+, XML, SOAP, DLL and other .Net assemblies
Use .Net assemblies from COM
C++
Pointers (in unsafe code)
Unsigned integers
Can only be run from FullyTrusted code

9. C# only Delegates Provide callbacks Eventing model
Type safe function pointers
Multicast
Asynchronous

10. C# only Enumerations Structs (value types)
Group together user defined constants
Type Safe
Structs (value types)
Created on the stack
Passed by value
No need to garbage collect

11. C# only Foreach Iterate through arrays, collections and classes
Consistent and concise
String[] months = {“Jan”,”Feb”,”Mar”,”Apr”,”May”};
Foreach{string month in months}
Console.WriteLine(“The month is “ + month);

12. C# only Properties Accessed as if it were a field
Same as getter and setter pattern
Maintains relationship between get and set
Foo.setSize(getSize() + 1);
Label.getFont().setBold(true);
Java/C++
Foo.size++;
Label.font.bold = true; C#

13. C# only Preprocessor Directives Runtime code generation
Pass by reference
Variable length parameter lists
Explicit Interface Implementation

14. Development Tools Visual Studio .Net Rich Client development
Web Client development
Mobile Client (WAP) development
Windows CE (PocketPC) development
Office 11 (soon) development
XML/XSL development
Integrated Source Control

15. Visual Studio .NET

16. Performance / Pet Shop

17. Maintainability / Pet Shop

18. Affordability
Windows on Intel delivers more bang for the buck than the Mainframe or UNIX-based servers
Visual Studio .NET
Less code
End to End Debugging
XCOPY deployment
Integrate existing code
Use existing developers skills

20. Summary C# and Java are very similar Power of C++ simplicity of VB
C# is a standard
ECMA-334 C#, ECMA-335 CLI, ISO
Robust Development Environment
High Performance
Lower cost

21. Links MaineBytes .Net User Group Pet Shop benchmark test
Pet Shop benchmark test
Comparison of C# and Java
(80 page white paper)

22. Links
Mono
Rotor