The main objective of this thesis is to create an extensible file manager application that is implemented with related .NET technologies. The main audience of this application is the advanced users those who would like to develop own extensions for their file manager software. The file manager application introduced in this thesis provides an extensible platform for file system components. Unlike the other file managers this contains the local file system module as an extension. Therefore this part of the system can be changed with an own implementation.
The thesis starts with the examination of architecture and extensibility related to the already available products from a developer point of view. Thereafter I present a part of the .NET framework that can be used to develop an extensible application. In the rest of the thesis I describe the development process of the file manager application in details. This includes the introduction of the specification, the designing and the implementing steps.