c# - Mysterious disappearing reference -

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i have seems strange problem windows forms application. web developer , have limited experience of developing windows forms application. working on ecommerce web site stores product images in database blobs. in order make easier bulk import images writing small windows forms utility uses existing website bll library. using visual studio 2010 c# , .net 4. created new windows forms project in solution , added reference bll project. started coding , added using statements code, working expected intelisense worked corectly bll classes etc. built project , failed, complained every line of code refered bll project including using statements, , intelisense no longer worked bll project. expect if there no reference bll project. if remove reference , re add it, or add ar reference projecct in solution, intelisense comes , of compiler errors disapear. if build again reappear , intelisense no longer works.

what missing, hell might going on here.

your library possibly has dependencies on other .net libraries such system.web need reference in forms app. can create sort of behaviour.


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