Lecture introduction to Csharp

Introduction to C# Tom Roeder CS 215 2006fa Goals of the course  Introduce C# language  ECMA standard  originally developed by MSR  not just Java + C++  many extensions  Introduce .NET framework  future of Windows  base of Microsoft’s C# implementation Non-goals  Teach you to program  should be very comfortable writing OO code  we will not cover much if any basic programming  Introduce object oriented languages  not even teach you OO style (except wrt C#)  expected to write all code in OO style  Give you a detailed grade  S/U only  even homework S/U Details  Requirements for the course  come to lecture  participate  do three assignments  Assignments are S/U  will not be giving a detailed grade  show me that you understand the concepts, and can write C# code  All three assignments will be online soon  must be completed by the end of the course Administrative Details  Class time MWF 12:20-1:10  office hours: W 10:30-12 or by appointment  tmroeder@cs.cornell.edu (4112 Upson)  Prerequisites: CS 211/212  really: experience in OO coding/concepts  Academic Integrity  Do not submit work that is not your own  minimum penalty: U in the course Useful Tools  Visual C#  Express: Google “Visual C# Express”  in Visual Studio: MSDNAA  must be version 2005: we need C# 2.0  Mono: http://www.go-mono.com  Open Source impl for Linux: not quite at 2.0  Rotor: http://msdn.microsoft.com/net/sscli  Shared Source impl for Windows (through 2.0)  Used to work on BSD / OS X, too Useful Tools  Portable.NET: http://www.dotgnu.org  yet another open source impl  CMS: http://cms.csuglab.cornell.edu  we will use this for homework  turn on your email notifications!  Course Webpage: http ://www.cs.cornell.edu/courses/cs215  will post lectures online  as well as any errata for the homework CSUGLab  You all will have accounts  MSDNAA access: let me know if you don’t currently have it  http://www.csuglab.cornell.edu/userinfo.html  Visual Studio .NET 2005 should be installed there Syllabus  Syllabus (10 more lectures)  C# constructs: 5 lectures  Types, Delegates, Generics, Reflection, Iterators  .NET Memory Management: 1 lecture  Topics: 4 lectures  C# 3.0, Threading, Security, MSIL, MSH Quiz 1  Each class will begin with a quiz  not for credit but for knowledge  but I will collect them and see what you know  Today’s quiz will be on prerequisites  OO programming, mainly to do with Java  If you don’t know Java, but do have OO experience, it’s OK  talk to me after if you have trouble [...]... in files called “assemblies”  code and metadata dll as before to run: public static  types    private: local directory, not accessible by others    void Main(string[] args) eg Wolfram NETLink shared: well-known location, can be GAC strong names: use crypto for signatures  then can add some versioning and trust COM vs NET  Historically, COM provided this integration      support for interfaces... called when constructors are called subset of the types in CTS are allowed Code that takes UInt32 in a public method UInt32 is not in the CLS Can mark classes as CLS-compliant  not marked is assumed to mean not compliant The Class Libraries  The common classes used in many programs   like Java Class Library eg     System.Console.WriteLine XML, Networking, Filesystem, Crypto, containers Can inherit...What is NET?   A Framework in which to run code A Common Language Runtime (CLR)        runs all programs C# compiles to Microsoft Intermediate Language MSIL runs on CLR Virtual Machine like Java code written in many languages compiles to MSIL A Common Language Specification (CLS) A Common Type System (CTS) What is NET? Web Services... GUID, lookup the type library dynamically instantiate class do RPC to make calls in many cases Difficult to get right   software engineering problems not type safe at all ASP.NET and ADO.NET  Use NET languages in web pages      thus can write typesafe code server-side or client-side Sharepoint interactions can log in Use the CLR to access databases   in the manner of ODBC provides classes for... Operating System From MSDN What is the CLR? Base Class Library Support Thread Support COM Marshaler Type Checker Exception Manager Security Engine Debug Engine MSIL to Native Compilers (JIT) Code Manager Class Loader From MSDN Garbage Collector (GC) What is the CTS?  A set of common types     any language that runs in CLR should implement no syntax specified Languages often define aliases For example... Constructions of Note  using   namespace    like import in Java: bring in namespaces disambiguation of names like Internet hierarchical names and Java naming class   like in Java single inheritance up to object Constructions of Note  Console.Write(Line)   Takes a formatted string: “Composite Format” Indexed elements: e.g., {0}     can be used multiple times only evaluated once {index [,alignment][:formatting]} . Syllabus  Syllabus (10 more lectures)  C# constructs: 5 lectures  Types, Delegates, Generics, Reflection, Iterators  .NET Memory Management: 1 lecture  Topics: 4 lectures  C# 3.0, Threading,. for Linux: not quite at 2.0  Rotor: http://msdn.microsoft.com/net/sscli  Shared Source impl for Windows (through 2.0)  Used to work on BSD / OS X, too Useful Tools  Portable.NET: http://www.dotgnu.org. Introduction to C# Tom Roeder CS 215 2006fa Goals of the course  Introduce C# language  ECMA standard  originally