 Krzysztof Cwalina Program Manager Microsoft Corporation  Brad Abrams Product Unit Manager Microsoft Corporation PC58

Dow Jones Industrial 9,000

Dow Jones Industrial 9,000

Framework Design Artifacts: Properties Properties Methods Methods Events Events Constructors Constructors

8 public class XmlFile { string filename; Stream data; public XmlFile(string filename) { this.data = DownloadData(filename); }} public XmlFile(string filename) { this.filename = filename; } public XmlFile(string filename) { this.filename = filename; }lazy

public class ArrayList { public int Count {get;} }

EmployeeList l = FillList(); for (int i = 0; i < l.Length; i++){ if (l.All[i] == x){...} if (l.All[i] == x){...}} if (l.GetAll()[i]== x) {...} if (l.GetAll()[i]== x) {...} public Employee[] All {get{}} public Employee[] GetAll() {} Moral: Use method if the operation is expensive Calling Code

24

Time to cut…

26

public class TheBase : Object { public override string ToString() { return “Hello from the Base"; } public class Derived : TheBase { public override string ToString() { return “Hello from Derived"; }

Derived d = new Derived(); Console.WriteLine (d.ToString()); TheBase tb = d; Console.WriteLine (tb.ToString()); Object o = tb; Console.WriteLine (o.ToString());

All Virtual members should define a contract Don’t require clients to have knowledge of your overriding Should you call the base?

Barbara Liskov

public interface IComparable { int CompareTo(object obj); }

Careful dependency management is the necessary ingredient to successful evolution of frameworks. Without it, frameworks quickly deteriorate and are forced out of relevance prematurely.

BCLBCL WPFWPF XMLXML ReflectionReflection   

49 Climbing a mountain?

50 Scaling a peak?

51 Running across a desert?

Falling into a pit?

Read the manual?? Read the manual??

PascalCasing – Each word starts with an uppercase letter camelCasing – First word lower case, others uppercase SCREAMING_CAPS – All upper case with underscores

public class MemberDoc { public int CompareTo(object value) public string Name { get;} }

public class CMyClass { int CompareTo (object objValue) {..} string lpstrName {get;} int iValue {get;} }

Brad Abrams Krzysztof Cwalina Please fill out the session evals!

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