Microsoft.Office.Interop.Excel dll is missing in visual studio 2015, quick fix

If you have newly installed visual studio 2015, you might not be having the Microsoft.office related dlls. So your existing project or new project in which you are using Microsoft  office related dlls you may face the library reference issues. to avoid these things you have to install micorsoft office tools for VisualStudio.
you can get the installer  here : download

Once you have done with the installation you can check office related dlls in this folder
C:\Program Files (x86)\Microsoft Visual Studio 14.0\Visual Studio Tools for Office\