title: extract 7zip in C# code
body: <p>I need use 7zip in C#. Without console, just with 7zSharp.dll ?
  + I find some data here</p>
  
  <p><a href="http://7zsharp.codeplex.com/releases/view/10305" rel="noreferrer">http://7zsharp.codeplex.com/releases/view/10305</a> ,</p>
  
  <p>but I don't know how to use it( - I could create .bat(.cmd) file, but I need throught dll file)
  Exactly:   I need extract .7z file with key)</p>