<p>I'm getting confused with the include/exclude jargon, and my actual SVN client doesn't seem to have (or I've been unable to find it easily) a simple option to add or remove a certain type of files for version control.</p>

<p>Let's say for example I've added the entire Visual Studio folder, with its solutions, projects, debug files, etc., but I only want to version the actual source files. What would be the simplest way to do that?</p>

At the lowest level, SVN allows you to ignore certain files or patterns with
svn:ignore
attribute. VS add-ins for SVN such as
VisualSVN
will automatically ignore those files on your behalf. If you're using
TortoiseSVN
, you can right-click files and folders in Explorer and choose
Add to Ignore List
.