My developer is trying to persuade me to move to .net from PHP.

I have always disliked the idea because of the costs.
But he's tryiong none the less. I've been using 
Movable-type on a number of websites for 
about a year and am worried about switching to another platform.
I have heard good things about blogengine.net. Is there a way I can transfer all my 
wordpress posts into it? Any kind of help would be really appreciated!