Short and incomplete notes on Rob Conery Pluralsight course “Exploring C# 6 with Jon Skeet”

• Auto-properties
  Immutability
  Old way (still can set anywhere within the class)

  public string Name {get; private set;}
  

  New way (can be set only in a constructor or initializer)

  public string Name{get;}
  

   
  Initializers

  public string Name{get;} = "J";
  

 

• Expression-bodied members
  For Properties
  Old way

  public Timespan Age{ get {return DateTime.UtcNow - DateOfBirth;}
  

  New way

  public Timespan Age => return DateTime.UtcNow - DateOfBirth;
  

   
  For Methods
  Old way

  public int GetName() {return "Joe";}
  

  New way

  public int GetName() => "Joe";
  

 

• nameof
  Old way
  Use string literal; expression tree, or [CallerMemberName] attribute
  New way
  nameof(propertyName)

 

• Using Static
  Old way

  Math.Sin(x)
  SomeEnum.EnumName
  

  New way

  using static System.Math;
  using static SomeEnum
  ...
  Sin(x)
  EnumName
  

 

• String Interpolation
  $”{SomePropertyOrExpression} …”

 

• Nullability
  Null Conditional Operator
  Old way

  return a!=null && a.b!=null && a.b.c=="abc";
  

  New way

  return a!.b!.c=="abc";
  

   
  Event Handlers
  Old way

  var handler = eventHandler;
  if (handler !=null) {handler...}
  

  New way

  eventHandler?.Invoke...
  

 

• Exception Filters

  catch(WebException e) when(e.Status == ...)