In any of the Visual Studio IDE, VS 2002 until VS 2008 each .cs or any other file was/is displayed in the form of a separate code-editor tab, and so at some point in time it was very common to have multiple files open in various code-editor tabs.
The problem comes when you want to close these tabs and it is and has been a troublesome process as in these versions of VS 2002 – VS 2008 there is a common closing tab on the right-hand-side so you have to go to that common closing button for each tab as shown in the screenshot below.
common closing button for all the tabs
Click on the image caption link to see larger view
In VS 2010 this behavior is changed and each tab has its own closing button, this makes it more simple and easy to use. Notice in the image below that each tab has its own closing button and there is no common closing button on the right-hand-side like in VS 2008 or any of the previous version of Visual Studio.