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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?
My class library and other project had different target framework. I set them to .Net Framework4, the problem is solved. Thank you for your helps.