This paper discusses the process of software evolution and especially software migration in the context of .NET Technologies. Actually most of the companies that uses legacy systems implemented with procedural languages as C, Visual Basic and so on, meet some problems when new requirement specifications have to be integrated.

One possibility to deal with this situation is to choose a good migration strategy from these legacy systems towards new Object Oriented design.

There are some migration processes that enable the fulfilment of this task but most of the time theses processes cannot be applied directly without any modification.

This report presents a migration strategy and migration process applied for a real case of an application in a company. The New Object Oriented design of the application and the result are discussed in the following sections of this document.