Why didn't header files catch on in other programming languages?
<p>Based on the response to this question: <a href="http://stackoverflow.com/questions/333889/in-c-why-have-header-files-and-cpp-files">Why does C++ have header files and CPP</a></p>

<p>I have seen the responses and understand the answers - so why didn't this catch on?  C# Java?</p>
