title: Using SHA1 in C# for Hashing string
body: <p>How can I get <code>SHA1 hash</code> in C# equivalent to produced by site <a href="http://www.sha1-online.com/" rel="nofollow">http://www.sha1-online.com/</a></p>
  
  <p>my sample string is</p>
  
  <blockquote>
    <p>"20150819100015.test.1002-4-2015.978.GBP"</p>
  </blockquote>
  
  <p>its hash string is  </p>
  
  <blockquote>
    <p>"caed6ade209e95ad973cce8def473f1e39e75c0b"</p>
  </blockquote>