C# is a programming language that compiles to Microsoft Intermediate Language (MSIL) rather than machine code like C/C++. MSIL can run on any platform that has the .NET Framework or .NET Core installed. When a C# program is executed, the MSIL is JIT compiled to native machine code. C# can be used for both Windows and cross-platform applications using .NET Standard libraries. Frameworks like Xamarin and Unity use Mono which implements .NET Standard to allow C# code to run on mobile and game consoles.

1. /// <summary>
/// What is C#.NET?
/// </summary>
/// <author>
/// NITTC Programming Club
/// 1I Siketyan
/// </author>
public class CSharp.NET<T>
{

2. public void CAndCSharp()
{
1}
C
Source.c
GCC
Clang
Output
[Native]
C#
Source.cs
Roslyn
(.NET Compiler)
Output
[MSIL]

3. public void HowToExecuteIL()
{
2}
Windows
Output [MSIL]
.NET Framework .NET Core
Mac Linux
Native
JIT (Just-In-Time Compile)

4. public void DotNetNative()
{
3}
MSIL (Microsoft Intermediate Language)
MDIL Compiler (Compiler in Cloud)
Native
MDIL (Machine Dependent Intermediate Language)
Linker

5. public void FrameworkAndCore()
{
4}
.NET Framework .NET Core
• Windows Only
• Bundled on Windows
(Win10 1709 : 4.7.1)
.NET Standard (PCL)
• Cross-platform
• User doesn’t need
dotnet runtime
• Open source
• Libraries works on .NET Framework/Core

6. public void Xamarin()
{
5}
Mono
• Open source
• .NET Standard libraries
• Also used on Unity
Native
Mono Runtime: Xamarin
IL2CPP: Unity

7. public static class Program
{
public static void Main()
{
Console.WriteLine(“Hello, world!”);
}
}
public void IfDotNetDoesNotExists()
{
6}
System.String
System.Void
System.Console

8. /*
Will be available
on SlideShare
www.slideshare.net
/NaokiIkeguchi
*/
}