How do I use ABCpdf from WebMatrix?
The way in which Assemblies are linked from a particular development environment is very much dependent on the development environment. So for best practice you should consult the documentation for your chosen environment. However you might like to use a register tag to link to the assembly and import the namespace: <%@ Register TagPrefix="pdf" Namespace="WebSupergoo.ABCpdf6" Assembly="ABCpdf, Version=6.0.0.5, Culture=neutral, PublicKeyToken=a7a0b3f5184f2169" %> Obviously you’ll need to modify the version and possibly the key to match the assembly you’re using.