This presentation discusses an overview of the .NET framework, a little history of C#, and the evolution of C# from its early days up to its current form including a preview of C# 7.0

1. C# and the Evolution of a
Programming Language
Jon Limjap
Microsoft MVP forVisual Studio and DevelopmentTechnologies
Philippine .NET Users Group Lead

2. About Me
Senior Software Architect, Beam And Go
Microsoft MVP forVisual Studio and Development
Technologies
Philippine .NET Users Group Lead
@lattex | jonlimjap@gmail.com

3. Philippine
.NETUsers
Group
(PHINUG)
facebook.com/groups/phinug
@phinug
phinug.doorkeeper.jp

4. Agenda
.NET Defined
What is C#?
A brief history of C#
A preview of C# 7

5. .NET Defined
Microsoft’s open source software development ecosystem

6. Ecosystem

7. Common
Language
Runtime
C#C# Visual Basic.NETVisual Basic.NET F#F#
Common Language RuntimeCommon Language Runtime
PC /TabletPC /Tablet
Windows
Phone
(RIP)
Windows
Phone
(RIP)
Windows
Server
Windows
Server
Mac /
Linux
Mac /
Linux
Android /
iOS
Android /
iOS
Intermediate LanguageIntermediate Language

8. Tools

9. VisualStudio 2015
Community Edition

10. More on open
sourced .NET
Visit http://microsoft.github.io

11. What isC#?
See sharp. Not see hash, or see pound

12. C# as a
language
Object Oriented
StronglyTyped
Declarative
Imperative
Functional
Generic

13. History
Continuous evolution of the C# language

14. History
Designed by Anders Hejlsberg
Originally named COOL (C-like Object-Oriented
Language)
First released in 2000
C# 7 is in Preview

15. Fanboy
Moment 

16. C# 2.0
November 2005
Generics
Partial Classes
Anonymous Methods
Iterators
NullableTypes
Static Classes
More…

17. C# 3.0
Novermber 2007
Implicitly typed variables aka var keyword
Object and collection initializers
Auto-properties
AnonymousTypes
Extension Methods
Language Integrated Query (LINQ)
Lambda Expressions
More…

18. C# 4.0
April 2010
Dynamic Binding
Named and Optional Parameters
Generic Covariance and Contravariance
More…

19. C# 5.0
August 2012
Asynchronous methods (async and await
keywords)
Caller info attributes

20. C# 6.0
July 2015
Using statements for static members
Auto-property Initializers
Getter-only automatic properties
Dictionary Initializers
Expression-bodied members
Await inside a finally block
Exception Filters
Null-conditional operators
String interpolation
And a few more…

21. C# 7.0
It’s getting funkier every version!

22. Local
Functions
class Program
{
static void Main(string[] args)
{
void testingLocalFunctions()
{
Console.WriteLine("Hello World!");
}
testingLocalFunctions();
}
}

23. Digit
separators
int bin = 0b1001_1010_0001_0100;
int hex = 0x1b_a0_44_fe;
int dec = 33_554_432;
int weird = 100_000;
double real = 1_000.111_1e-1_000;

24. Binary Literals int nineteen = 0b10011;

25. Pattern
Matching
int? age = 5;
if (age is int newVal)
{
Console.WriteLine($"Your age is {newVal}");
}

26. Ref returns
and Ref Locals
string[] myArray = { "one", "two", "three" };
WriteLine($"The first element of the array is {myArray[0]}");
ref string n = ref FirstElement(myArray);
n = "other"; //myArray[0] now equals "other"
WriteLine($"The first element of the array has become
{myArray[0]}");

27. C# 7 features
that will
probably be
released but
are not
available yet 

28. Tuples
public (int x, int y) Compute(){}
// Call the method
var (x,y) = Compute();
public (int sum, int count) Tally(IEnumerable<int> values)
{
sum = 0; count = 0;
foreach (var value in values) { sum += value; count++; }
return (sum,count);
}

29. RecordTypes
//Instead of:
public class Cube
{
public int Width { get; set; }
public int Height { get; set; }
public int Depth { get; set; }
}
//We write this:
public class Cube(int Width, int Height, int Depth)

30. Question &Answer
Thank youandplease join the
PHINUGFBGroup!facebook.com/groups/phinug