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]}
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