Building a c# class library project

[Hello]

I am working on a existing c# class library project. I want to add few more class to it. This is then used in a new project. I have added the required classes to the existing typelib project, but when I refer the typelib in the next project and try to access the newly added methods it showing error\[quote\] The type or namespace name 'abc' does not exist in the name space xyz.TypeLib.core (are you missing assembly reference)\[/quote\]but I can access all those classes which existed previously in that project. I am having issue with newly added files.here is the step I dd, \[quote\] [*]added new classes to the existing project. [*]Build the project [*]Added dll to next project from the bin folder of the class library project \[/quote\]Also, as a test I also tried adding a new method in one of the classes which I can access, but this method is not avaiable!How can I do this properly?Thanks