title: Compare 2 Text files line by line and replace when true or false
body: <p>I have 2 text (ini) files to compare. first one reads</p>
  
  <pre><code>NUMM=1
  DURC=360
  VORS=2500
  SPAN=130
  </code></pre>
  
  <p>the second one reads</p>
  
  <pre><code>NUMM=0
  DURC=340
  VORS=3000
  SPAN=140
  </code></pre>
  
  <p>in a third file I say which data form the first file should be replace in the second file by telling true or false</p>
  
  <pre><code>NUMM=false
  DURC=true
  VORS=true
  SPAN=false
  </code></pre>
  
  <p>Result of the second file after replaceing should be</p>
  
  <pre><code>NUMM=1
  DURC=340
  VORS=3000
  SPAN=130
  </code></pre>
  
  <p>I tried a few ways but could not work it out in C#</p>