There are 2 dlls are available(One dll comes with .NET framework and another is in application) with same name. When i am trying to debug this i am getting 'dll conflict error'. Then i removed the dll that is with application then i am getting 'unable to find type or name space' error. After that i have changed the name of the dll that is in application then i have added that dll to the project using 'Add Reference' option. then also i am getting error 'unable to find type or name space'. Could you give you valuable suggestions.