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CSC 298

CSC 298. Introduction to C#. What to expect in this class. Background: knowledge of an object oriented language of the C++, Java, … family. No need to know inheritance. Outcome: how to program in C# (syntax, inheritance, libraries, using some .NET features: ASP.NET, Web Services, ADO.NET…)

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CSC 298

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  1. CSC 298 Introduction to C#

  2. What to expect in this class • Background: knowledge of an object oriented language of the C++, Java, … family. No need to know inheritance. • Outcome: how to program in C# (syntax, inheritance, libraries, using some .NET features: ASP.NET, Web Services, ADO.NET…) • Class organization: • Lectures, lab practice with sample code, homework assignments, tests and quizzes • class web site • www.seattlecentral.org/faculty/flepeint/csharp

  3. Why are we learning C#? • A modern language • object oriented, “portable”, secure • A better C++? • some features of C++ are overly complex (e.g. multiple inheritance) • C# doesn't include any of these • C# features a garbage collector • Open the doors of .NET, the Microsoft initiative.

  4. What is .NET? (1) • Microsoft latest approach to programming • CLR: common language runtime. The virtual machine that executes the .NET application. It understands only Intermediate Language (IL). • A .NET application can be written in any language as long as it can be compiled into IL (C#, VB.NET, J#, FORTRAN, …) • .NET framework offers many libraries to make computing across a network easy (use of XML to convey information between machines).

  5. What is .NET? (2) • Distributed computing: Companies can expose their services through the web (Web services) • practically, in a program one can seamlessly use objects (methods + data) that reside on a computer across a network. • .NET offers powerful tools to use databases • Microsoft sells many servers (e.g. Biztalk) to help companies publish their services with .NET. We will use IIS. • Old fashioned applications (running only on one computer) can still be developed with .NET.

  6. The Common Language Runtime Mac ? Unix (e.g. FreeBSD) Windows Source Code (.cs file) C# Compiler IL code (.exe file) CLR (JIT compiler JIT: Just in Time)

  7. Lexicon • CLR: Common Language Runtime • IL: Intermediate language • FCL: Framework Class Library, the set of all classes available to the .NET programmer. • CLS: Common Language Specification, the features of the CLR that must be implemented by a language to run on .NET (C# goes beyond the CLS). • CTS: Common Type System, describes how types are defined and how they behave (=rules to define classes…)

  8. Resources • Text: Liberty’s C# - a good reference but not required. • VS.NET framework is available via MSDNAA (a very good deal!) • Enormous amount of resources • within Visual studio documentation • msdn.microsoft.com

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