"if sting in string"

[smadus via Digitalmars-d-learn]

Ok i have rewrite :)

Now:
http://dpaste.dzfl.pl/cf8bb54b1390

The Problem is:

http://www.directupload.net/file/d/4114/9zryku49_png.htm

but i dont understand this, because, the exception should be 
"Something wrong" ?!?

But, thanks for the answers, realy good and the code has been 
smaller.