title: Excel Paste Special and Add Operation
body: <p>When we want add a Number (for example 5) to all of excel worksheet cells, you can copy cell containing the value 5, select range of other cells we want (for example a 10x10 Range) and Right click-> Paste special then check add Operation and click OK.</p>
  
  <p>I want to add 5 to all of cells in selected range with Excel Interop dll in C#. How can this be achieved?</p>