I am trying to implement very simple sample of boost serialization. I have a sample class, class1. It only contains a simple int variable. I followed the examples given here : http://www.boost.org/doc/libs/1_45_0/libs/serialization/doc/index.html <http://www.boost.org/doc/libs/1_45_0/libs/serialization/doc/index.html> I also think that i followed this guideline : http://beta.boost.org/doc/libs/1_44_0/more/getting_started/windows.html but i am not sure... Here is the error i get: error LNK2019: unresolved external symbol "private: void __thiscall class1::serialize<class boost::archive::text..... Could you help me with this error or could you guide me with installation and running a very simple serialization example, step by step... like download this, install this and etc... I am using visual studio 2008 express... Thanks in advance..