How to execute an SSIS package from .NET?

I have a SSIS package that eventually I would like to pass parameters too, these parameters will come from a .NET application (VB or C#) so I was curious if anyone knows of how to do this, or better yet a website with helpful hints on how to do it. So basically I want to execute a SSIS package from .NET passing the SSIS package parameters that it can use within it. For instance, the SSIS package will use flat file importing into a SQL db however the Path and name of the file could be the parameter that is passed from the .Net application.