dotMSN: .NET Messenger Library

What is dotMSN?

dotMSN is a class library to make use of the MSN Messenger Service. The library is built in C# and can therefore be used by all languages the .NET environment supports. The library is easy to use because of a clean object oriented approach which is offered by a modern language like C#. You can use this library for example to create MSN bots or for use in already existing applications who need to communicate through the Messenger service.

The library currently supports:

  • Connecting / disconnecting with the MSN Messenger service.
  • Fires events when contact go online or offline or change status
  • Automatically synchronizes contact lists and keep contact data up to date
  • Create/Remove contactgroups
  • Convenient enumerating through contacts in different lists
  • Request or receive conversations
  • Multiple users in one conversation
  • Send messages
  • Received messages include information about font, charset, color, decoration
  • Privacy settings of the contactlist owner
  • Provides hotmail inbox status
  • Error handling

There are still some things yet to be implemented:

  • Notify of new incoming e-mail messages
  • File transfer
  • Owner profile
  • Bugfixes probably

dotMSN is not yet open-source. As i don't know what to do with it yet. The documentation will answer most of your questions anyway.


The documentation can be found here


The latest version is 0.8beta. You can download it here. This is the DLL simply reference this dll and you will be able to use dotMSN (use namespace 'DotMSN'). Since this is my first release be aware of bugs and other flaws you come across. Please send these errors to me (
[email protected]). Ofcourse i'm also available for suggestions.

An simple example of how to use this library is also available.

dotMSN 0.8beta

Server.MapPath() error 'ASP 0173 : 80004005'

Invalid Path Character

/, line 31

An invalid character was specified in the Path parameter for the MapPath method.

Similar Articles