title: What case is `This_Variable`?
body: <p>I saw something like <code>This_Variable</code> in my colleague's code. The language is C#.</p>
  
  <p>I know <code>ThisVariable</code> is PascalCase, <code>thisVariable</code> is camelCase and <code>this_variable</code> is snake_case. But I've never seen a stuff such as <code>This_Variable</code>. What is this case called?</p>
  
  <p>Maybe Pasnake_Case?</p>