Programming in C# Assemblies in C# .[dot]net

Programming in C# Assemblies 

Assemblies

•         Code contained in files called “assemblies”

–        code and metadata

–        .exe or .dll as before

–        Executable needs a class with a “Main” method:

•       public static void Main(string[] args)

–        types

•       local: local assembly, not accessible by others

•       shared: well-known location, can be GAC

•       strong names: use crypto for signatures

–        then can add some versioning and trust        

PE executable file  :

Manifests and Assemblies  :

First C# Program :

using System;

namespace Test

{

class ExampleClass

{

   static void Main()

   {

      System.Console.WriteLine("Hello, world!");

   }

}

}

Constructions of Note :

•       using

–        like import in Java: bring in namespaces

•       namespace

–        disambiguation of names

–        like Internet hierarchical names and C++ naming

•       class

–        like in C++ or Java

–        single inheritance up to object

•       static void Main()

–        Defines the entry point for an assembly.

–        Four different overloads – taking string arguments and returning int’s.

•       Console.Write(Line)

–        Takes a formatted string: “Composite Format”

–        Indexed elements: e.g., {0}

•       can be used multiple times

•       only evaluated once

–        {index [,alignment][:formatting]}