Could not load file or assembly 'HtmlAgilityPack, Version=1.11.7.0?

I have F# console project which uses HtmlAgilityPack. It worked and I upgraded version 1.11.7.0. Now it got the following error?

System.IO.FileLoadException

HResult=0x80131040

Message=Could not load file or assembly 'HtmlAgilityPack, Version=1.11.7.0, Culture=neutral, PublicKeyToken=bd319b19eaf3b43a' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)