title: My class library couldn't be found when I want to use it from another project
body: <p>I have a class library and I want to use it as a reference from another projects. But, when I try to create an instance of a public class wich in this library, I can't build the project. It says, type or namespace ClassLibName could not be found. (are you missing a using directive or an assembly reference?). I checked reference and add it again. I add namespace too. Do you have any suggestion about this problem?</p>