title: merge excel cells via VB.NET without asking when every cell has a value
body: <p>I have a VB.NET website and I am organizing some data in excel file. 
  I need to merge cells which have same data in excel but everytime I try to this operation, program stops and shows this notification: </p>
  
  <p><img src="https://i.stack.imgur.com/CEjK3.png" alt="enter image description here"></p>
  
  <p>I don't want to see it and I want program to continue without asking. Is it possible, thanks.. </p>