title: (When) Is it necessary to call SHA1Managed.Initialize()?
body: <p>What does <code>SHA1Managed.Initialize()</code> actually do? When is it necessary to call it? <a href="https://msdn.microsoft.com/en-us/library/system.security.cryptography.sha1managed.initialize%28v=vs.110%29.aspx" rel="nofollow">The documentation</a> is very sparse.</p>