The document summarizes new features in C# 6 including string interpolation for embedding variables in strings, null conditional operators to avoid null reference exceptions, using static for calling static methods without qualifying the class, auto-property initializers to set property values in the constructor, expression-bodied methods and properties for more concise syntax, nameof expressions for compile-time checked names, exception filters for catching specific exceptions, index initializers for simplifying dictionary initialization, and await in catch/finally blocks for asynchronous exception handling. It also previews potential future features like primary constructors and indexed property operators.

1. WHAT’S NEW IN
C# 6

2. STRING
INTERPOLATION

3. No Interpolation

4. Concatenation

5. String.Format

6. $”Hello {var1}”
C#
6.0

7. $”Value of {price:C2}”
C#
6.0

8. NULL CONDITIONAL
OPERATOR

9. Checking for null

10. Is a drag

11. Don’t check

12. Shortcircuit to null

13. perhapsNull?.FullName()
C#
6.0

14. USING STATIC

15. Static methods have
to be always
qualified

16. Enumerable.Empty<T>

17. using static Enumerable;
C#
6.0

18. Empty<T>
C#
6.0

19. AUTOPROPERTIES
INITIZALITION

20. Getter and Setter
declaration

21. Initialize in the
constructor

22. string Name {get; set;} = “Harry”
C#
6.0

23. GETTER ONLY
INITIALIZATION

24. Getter declaration

25. Initialize in
constructor

26. string Name {get;} = “Harry”
C#
6.0

27. EXPRESSION BODIES
ON METHODS

28. Methods always
need a body

29. No matter how short

30. void Method() => expr
C#
6.0

31. EXPRESSION BODIES
ON PROPERTIES

32. Properties always
need a body

33. No matter how short

34. void Property => expo
C#
6.0

35. NAMEOF
EXPRESSIONS

36. Using hardcoded
strings to refer to
expressions

37. Is error prone

38. Wrong spelling

39. Variable changes

40. nameof(var.FirstName)
C#
6.0

41. EXCEPTION
FILTERS

42. Similar to VB.NET
and F#

43. Exception catch block
can have a guard

44. try {…}
catch (Exception e)
when (expr) { … }
C#
6.0

45. INDEX INITIALIZER

46. Simplify dictionary
initialization

47. var numbers = new Dictionary<int, string>
{
[7] = "seven",
[9] = "nine",
[13] = "thirteen"
};
C#
6.0

48. AWAIT
ON CATCH/FINALLY
BLOCKS

49. Similar to F#

50. Catch and Finally
blocks can have Await
calls

51. Resource res = null;
try
{
res = await Resource.OpenAsync(…);
…
}
catch(ResourceException e)
{
await Resource.LogAsync(res, e);
}
finally
{
if (res != null) await res.CloseAsync();
}
C#
????

52. PRIMARY
CONSTRUCTORS

53. Simplify constructor
declaration

54. public class Post(long postId,
string name, string title)
{
public long PostID { get; } = postId;
public string PostName { get; } = name;
public string PostTitle { get; } = title;
}
C#
????

55. INDEXED PROPERTY
OPERATOR

56. Simplify Dictionary
initialization

57. dict[“Harry”]

58. dict.$Harry
C#
????

59. THANK YOU!

60. The Smartest tool
for agile project
management
http://smartview.io

61. amir@barylko.com
@abarylko
http://bit.ly/abarylkoslides
http://orthocoders.com
http://westerndevs.com

62. Resources
• Github Wiki C# 6 language features: http://bit.ly/Csharp6_features
• MSDN C# 6 features: http://bit.ly/csharp6_msdn
• C# 6.0 in six screenshots: http://bit.ly/csharp_screenshots

63. Photo Credit
• Under http://creativecommons.org/licenses/by/2.5/
• Jeremy Keith, Roast beef, http://flic.kr/p/TKUz
• Rob Campbell, Field of daisies, http://flic.kr/p/6QJjU4