How to reference Microsoft Office Interop Excel dll

Question

Using MS Visual Studio 2005, I created an Excel-related solution in 2006. With MS Visual Studio 2012, I can no longer utilize the same reference.

var app = new Microsoft.Office.Interop.Excel.Application();
Workbooks wbs = app.Workbooks;

Answer 1

Use NuGet (VS 2013+):

The NuGet package manager is the simplest method in any modern version of Visual Studio. (Even VS2013, with the NuGet Package Manager for Visual Studio 2013 extension.) 

Right-click on "References" and choose "Manage NuGet Packages...", then just search for Excel.