title: How to read very large file i.e 100MB as String
body: <p>My <code>large_file.txt</code> contains <code>&lt;tag&gt;</code> to represent data such as parents, childs and so on. My <code>large_file.txt</code> format is not xml format. </p>
  
  <p>I want to read <code>large_file.txt</code> size 100 MB as a one string, then using String matching to get my data as a object. </p>
  
  <p>Any help please?</p>
  
  <p>Thanks in advance</p>