Errors in linkedinlogin

Hey that namespace is not exists and you need to add that dll first. Once you added that dll then automatically namespace error will remove. Thanks.

https://forums.asp.net/t/1966256.aspx?Strange+Error+already+added+the+reference+but+have+the+type+or+namespace+name+does+not+exist+error https://stackoverflow.com/questions/5567945/type-or-namespace-name-does-not-exist https://stackoverflow.com/questions/14440401/the-type-or-namespace-name-doesnt-exist-in-the-namespace-etc