That is a bit hard to write a mp3 player in C#. I think you may need to find third party mp3 decoder dll. But if you only want to play to a wav file, that is very easy. .Net libraries already have a control class for you.
All you need to put the file name into the constructor
Then you can play and stop the file by these methods:
This afternoon, I wrote an example project for this. Moreover, this project is implemented in WPF rather than normal Windows Forms, because I wish to practice my WPF skills.
Download the example project, please click here.
I found Skype has API for developers. I can using Skype4COM to allow my C# code to access Skype, so that I can make a call or send a SMS via Skype from my C# application.
There are a lot of detialed tutorials in this URL:
I found a good tutorial about importing outlook contacts. Basically, you can use Outlook COM object to access the contacts.
Mono 2.4.2 is released. Please download at http://www.go-mono.com/mono-downloads/download.html