How to get classes from different namespaces

In one class I have a library project with a file class1 with namespace : solution.Class1

and i have another class library project in the same solution with a file class2 with namespace : solution.Class2

How i get o开发者_JAVA技巧bjects from solution.Class1 namespace in class2 file ? It is not visible.

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You need to add a reference to the project 1 from project 2. Right click on project 2 and you should see the dialog option.