title: how to insert newline in string in c# after some particular digit?
body: <p>i was programming some code in which i have to enter text in a particular format only.
  i.e.</p>
  
  <pre><code>2
  10 5 kdsfj ejkd kjdf
  7 8 sdkj dsjklf ckjsd dksj
  </code></pre>
  
  <p>and so on</p>
  
  <p>but i have to enter the data form a text file having the whole as a string as </p>
  
  <p><strong><code>2 10 5 kdsfj ejkd kjdf7 8 sdkj dsjklf ckjsd dksj6 12 kjd ekjr fkjdr fdkj</code></strong></p>
  
  <p>but i want to suppy the text as given above format.
  Bold letters are saparable points.
  i want a program so that it can add a newline after character or space followed by digit ?</p>
  
  <p>How can i do that ?</p>