Basic namespaces: System

Contents

• I. System.

All these Classes need to be described. Who wants to help? Helping is really easy and a straight forward task. It's enough if you pick only *one* class. Contact me at johannes@jroith.de.

I. System.Object

System.Console

Console.Write() : Writes output to the console.
Console.WriteLine() : Adds \n at the end of the line.

Both are overloaded serval time, so you can pass them Boolean, Int32, Char, Double, String, ...

Console.Read() : Read a single char.
Console.WriteLine() : Reads complete line.

// getname.cs

using System;

class consoletest {

	public static void Main(){

		string name;

		Console.Write("Please enter your name: ");
		name = Console.ReadLine();
		Console.WriteLine("Hello, " + name + "!");

	}

}

System.String

System.Uri

System.UriBuilder

System.Convert

System.GC

System.BitConverter

System.Version

Each number is then accessible as obj.Major, obj.Minor, obj.Revision, obj.Build.

// guidtest.cs
// Generates a version form 4 integers, Splits the numbers again from the string.

using System;

class versiontest {

	public static void Main(){

		Version v = New Version(1, 3, 12, 40);

		// v.ToString() is now  "1.3.12.40"
		Version v2 = New Version(v.ToString());

		Console.WriteLine("Major:"    + v2.Major);
		Console.WriteLine("Minor:"    + v2.Minor);
		Console.WriteLine("Revision:" + v2.Revision);
		Console.WriteLine("Build:"    + v2.Build);		

	}

}

System.Guid

Important is, that the method NewGuid must be called, to generate an unique number.

// guidtest.cs

using System;

class guidtest {

	public static void Main(){

		string name;
		Guid myguid = New Guide();
		myguide = myguide.NewGuid();

		Console.WriteLine(myguide.ToString());

	}

}

System.Math

Offers many mathematical funtions:

• Abs()
• Acos()
• Asin()
• Atan()
• Atan2()
• Ceiling()
• Cost()
• Cosh()
• Exp()
• Floor()
• IEEERemainder()
• Log()
• Log10()
• Max()
• Min()
• Pow()
• Round()
• Sign()
• Sin()
• Sinh()
• Sqrt()
• Tan()
• Tanh()

[TODO: Write a big example, where they all can be used]

System.Enviroment

There is nothing to explain, instead of that here is a good commented example, printing all properties.

[TODO: Write Example]

// enviroment.cs

using System;

class Enviroment {

	public static void Main(){

		Console.WriteLine("Computer name: " + System.Enviroment.MachineName);

		// continue...
	}

}