title: what is mean of error LNK unresolved external symbol?
body: <p>anyone can help me to undrestand this linker error?
  how i can found exact place of error from reading this linker error?</p>
  
  <pre><code>error LNK2019: unresolved external symbol "__declspec(dllimport) const Serialization::Serialization::IBufferWriter::`vftable'" (__imp_??_7IBufferWriter@Serialization@1@6B@) referenced in function "public: __thiscall Serialization::Serialization::IBufferWriter::IBufferWriter(class Utils::IBuffer &amp;)" (??0IBufferWriter@Serialization@1@QAE@AAVIBuffer@Utils@@@Z)
  </code></pre>