Framework Design Guidelines
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Framework Design Guidelines
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Framework Design Guidelines
- 3. Four Keys of Framework Design
- 4. Outline
- 13. EmployeeList l = FillList(); for (int i = 0; i < l.Length; i++){ if (l.All[i] == x){...} } public Employee[] All {get{}} Moral: Use method if the operation is expensive Calling Code Properties and returning arrays
- 15. CONSIDER using extension methods to "add" methods to interfaces
- 16. CONSIDER using extension methods to manage dependencies Uri uri = “ftp://some.ftp.uri”.ToUri(); // higher level assembly (not mscorlib) namespace System.Net { public static class StringExtensions{ public static Uri ToUri(this string s){ … } } }
- 18. AVOID defining extension methods on System.Object
- 19. Type Design
- 20. Start Run
- 22. What we ship: Too much and not enough…
- 29.
- 31. Libraries , Primitives, Abstractions
- 35. Trends
- 37. Heavy Dependencies & Testability
- 38. Inversion of Control // your better API public abstract class TraceListener { public abstract void Trace(string message); } public class Tracer { TraceListener listener; public Tracer( TraceListener listener ){ this.listener = listener; } public void Trace(string message){ listener.Trace(message); } }
- 39. Dependency Injection Check Containers like: Spring.NET, Castle Windsor , Structuremap, , Unity … MEF session tomorrow will talk about it (isA)
- 41. The perilous summit of complexity by example
- 42. How do I read all the lines from a file?
- 43. VS7 Era “ IO” seems like a reasonable place to start
- 44. Why did they make it inaccessible Backup, and try again…
- 45. Open.. Looks like a good first step…
- 46. Hmm… OK, what do I do with a FileStream?
- 47. Ok good, synchronous and asynchronous operations.. What the heck is that?
- 48. I think I am in the wrong place..
- 49. Back up, let’s try a different type
- 50. Ahh, ReadLine(), this looks more promising..
- 51. OK, How do you find the end?
- 52. Thanks goodness there was a sample
- 54. Just what I need…
- 55. Ah, a string[] I know just what to do with that…
- 56. How simple!
- 57. Tools
- 65. Make the simple things simple and the hard things possible