This document contains slides from presentations on new features in C# 6.0 and beyond. It discusses the speaker and event details for a DotNetLombardia meetup in Milan, Italy focused on C# and .NET. The slides cover topics like auto-properties, read-only structs and fields, exception filters, null-conditional operators, string interpolation, and nameof.

1. https://github.com/marcoparenzan/CSharpDay2015https://github.com/marcoparenzan/CSharpDay2015
DotNetLombardia
Milano Fiori, Italy
Slides from:
http://www.slideshare.net/fekberg1/c-60-what-c-is-being-updated-42437422 (Filip Ekberg)
http://www.slideshare.net/BlackRabbitCoder/little-wonders-5747749 (James Michael Hare)
http://downloads.academy.telerik.com/svn/seminars/2014-10-CSharp-6-and-Roslyn/What-is-New-in-CSharp-6.0.pptx (Telerik Academy)

2.  www.slideshare.net/marco.parenzan
 www.github.com/marcoparenzan
 marco [dot] parenzan [at] 1nn0va [dot] it
 www.1nnova.it
 @marco_parenzan
Formazione ,Divulgazione e Consulenza con 1nn0va
Microsoft MVP 2015 for Microsoft Azure
Cloud Architect, NET developer
Loves Functional Programming, Html5 Game Programming and Internet of Things AZURE
COMMUNITY
BOOTCAMP 2015
IoT Day - 08/05/2015
@1nn0va
#microservicesconf2015
9 Maggio 2015

57. var code = File.ReadAllText("Code.cs");
var tree = SyntaxFactory.ParseSyntaxTree(code);

59. var localDeclarationNodes =
tree.GetRoot()
.DescendantNodes()
.OfType<LocalDeclarationStatementSyntax>();

60. var tokens = node.ChildTokens();
var token = tokens.First();
token.Value;

62. var options = new
CSharpCompilationOptions(OutputKind.DynamicallyLinkedLibrary);
var reference = new
MetadataFileReference(typeof(object).Assembly.Location);
var compilation = CSharpCompilation.Create("Test")
.WithOptions(options)
.AddSyntaxTrees(tree)
.AddReferences(reference);

64. var comp = CreateCompilation(tree, options, reference);
var model = comp.GetSemanticModel(tree);
var localDeclarationNodes = tree.GetRoot()
.DescendantNodes()
.OfType<LocalDeclarationStatementSyntax>();
foreach (var node in localDeclarationNodes)
{
var info = model.GetTypeInfo(node.Declaration.Type);
Console.WriteLine("{0} {1}", info.Type, node.Declaration);
}

65. using (var memory = new MemoryStream())
{
compilation.Emit(memory);
var assembly = Assembly.Load(memory.GetBuffer());
var type = assembly.GetType("NameOfType");
var instance = Activator.CreateInstance(type);
}

69. https://github.com/dotnet/roslyn/issues/2136
#347
#206
#206
#227
#114 #261
#3910

71. https://github.com/marcoparenzan/CSharpDay2015https://github.com/marcoparenzan/CSharpDay2015
DotNetLombardia
Milano Fiori, Italy

73. class Person
{
public string Name { get; set; }
}
class Person
{
public string Name { get; } = "Anonymous";
}
= "Anonymous";

74. class Person
{
public string Name { get; }
public Person()
{
Name = "Filip";
}
}

75. class Person
{
private readonly string <Name>k__BackingField = "Filip";
public string Name
{
get
{
return this.<Name>k__BackingField;
}
}
}

77. struct Point
{
public int X { get; }
public int Y { get; }
}
Read Only!
public Point()
{
X = 100;
Y = 100;
}

78. Read Only!
struct Point
{
private readonly int <X>k__BackingField;
private readonly int <Y>k__BackingField;
public int X
{
get
{
return this.<X>k__BackingField;
}
}
public int Y
{
get
{
return this.<Y>k__BackingField;
}
}
public Point()
{
this.<X>k__BackingField = 100;
this.<Y>k__BackingField = 100;
}
}

79. Read Only!
struct Point
{
public int X { get; }
public int Y { get; }
public Point(int x, int y)
{
X = x;
Y = y;
}
public Point() : this(100, 100)
{
}
}

81. class Program
{
static void Main(string[] args)
{
var angle = 90d;
Console.WriteLine(Math.Sin(angle));
}
}

82. using System.Console;
using System.Math;
class Program
{
static void Main(string[] args)
{
var angle = 90d;
WriteLine(Sin(angle));
}
}

83. using System.Console;
using System.Linq.Enumerable;
class Program
{
static void Main(string[] args)
{
foreach (var i in Range(0, 10))
{
WriteLine(i);
}
}
}

85. var people = new Dictionary<string, Person>
{
["Filip"] = new Person()
};
var answers = new Dictionary<int, string>
{
[42] = "the answer to life the universe and everything"
};

87. public async Task DownloadAsync()
{
}
try
{ }
catch
{
await Task.Delay(2000);
}
finally
{
await Task.Delay(2000);
}

89. try
{
throw new CustomException { Severity = 100 };
}
catch (CustomException ex) if (ex.Severity > 50)
{
Console.WriteLine("*BING BING* WARNING *BING BING*");
}
catch (CustomException ex)
{
Console.WriteLine("Whooops!");
}

91. class Person
{
public string Name { get; set; }
public Address Address { get; set; }
}
Console.WriteLine(filip.Address.AddressLine1);
var filip = new Person
{
Name = "Filip"
};
class Address
{
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
}

92. class Person
{
public string Name { get; set; }
public Address Address { get; set; }
}
Console.WriteLine(filip.Address.AddressLine1);
var filip = new Person
{
Name = "Filip"
};
class Address
{
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
}

93. class Person
{
public string Name { get; set; }
public Address Address { get; set; }
}
Console.WriteLine(filip.Address.AddressLine1);Console.WriteLine(filip.Address == null ? "No Address" : filip.Address.AddressLine1);
var filip = new Person
{
Name = "Filip"
};
class Address
{
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
}

94. class Person
{
public string Name { get; set; }
public Address Address { get; set; }
}
Console.WriteLine(filip.Address.AddressLine1);Console.WriteLine(filip.Address == null ? "No Address" : filip.Address.AddressLine1);
Console.WriteLine(filip?.Address?.AddressLine1 ?? "No Address");
var filip = new Person
{
Name = "Filip"
};
class Address
{
public string AddressLine1 { get; set; }
public string AddressLine2 { get; set; }
}

95. var people = new[]
{
new Person(),
null
};
WriteLine(people[0]?.Name);
WriteLine(people[1]?.Name);

96. Person[] people = null;
WriteLine(people?[0]?.Name);
Person[] people = null;
Console.WriteLine(
(people != null) ?
((people[0] == null) ? null : people[0].Name)
: null
);

98. class Rectangle
{
public double Width { get; set; }
public double Height { get; set; }
public double Area => Width * Height;
}

99. class Rectangle
{
public double Width { get; set; }
public double Height { get; set; }
public override string ToString() =>
$"My Width is {Width} and my Height is {Height}";
}

101. public override string ToString() =>
$"My Width is {Width} and my Height is {Height}";

102. public override string ToString() =>
$”My Width is {Width} and my Height is {Height}";
public override string ToString()
{
object[] args = new object[] { this.Width, this.Height };
return string.Format("My Width is {0} and my Height is {1}", args);
}

103. int age = 28;
var result = $"Hello there, I'm {age : D5} years old!";
WriteLine(result);
int num = 28;
object[] objArray1 = new object[] { num };
Console.WriteLine(string.Format("Hello there, I'm {0:D5} years old!", objArray1));

105. static void Main(string[] args)
{
WriteLine($"Parameter name is: {nameof(args)}");
}

106. public double CalculateArea(int width, int height)
{
if (width <= 0)
{
throw new ArgumentException($"Parameter {nameof(width)} cannot be less than 0");
}
return width * height;
}