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1	Introduction to C# Andrew Scott Computing Department Lancaster University, UK
2	C# Modern Object-Oriented language Based on Microsoft .net framework Also, a Component-Oriented language Based on C Inevitably looks like Java Many subtle …and some not so subtle differences
3	C# Keywords
4	Statements Must Do Work Unlike in C statements cannot just be expressions…
5	Conditionals: if Conditions must be boolean Must always evaluate to true or false
6	Conditionals: if Conditions must be boolean Must always evaluate to true or false
7	Operators
8	Switch All but the last case must break or goto Unless no work done Order un-important
9	Switch All but the last case must break or goto Unless no work done Order un-important
10	Loops: do and while
11	Loops: for
12	.NET Primitive Types
13	.NET Primitive Types
14	.NET Primitive Types
15	.NET Primitive Types All languages adopt framework types So… a string is a string whatever the language Unified type system Everything is an object
16	Type Aliases
17	Quoted Strings: @ verbatim string s = “C:\\Program Files\\”; string s = @“C:\Program Files\”; string s = @“ This is still and ““Hello!”” to you”; public void @public { . . . }
18	.NET Type System Reference types Classes Interfaces Arrays Delegates Value types Primitives Enumerators Structures
19	Boxing and Un-boxing
20	Boxing and Un-boxing
21	Boxing and Un-boxing
22	Classes and Instances
23	Variable and Constants
24	Class and Instance Methods
25	Class and Instance Methods
26	The System.Object Class Basis for all other objects System.Object (object) And therefore every object supports: Equals() GetHashCode() GetType() ToString()
27	Properties
28	Exceptions (try and catch)
29	Exceptions (try and catch)
30	Using Exceptions
31	Using Exceptions
32	Using Exceptions
33	Using Exceptions
34	Creating New Exceptions
35	Creating New Exceptions
36	…and Finally
37	C# Keywords