Here’s an example:
private void btnUndo_Click(object sender, EventArgs e)
{
<<<<<<< .mine
=======
The third and fourth line are being added to other developers machines when they do an update with from my commit. I’m using SVN.
What is being added here?
You/Somebody had a conflict on the update/commit and you didn’t resolve it before checking in.
The
<<<<<and=====is there to show you what part of the source code is conflicting, and you need to resolve those before you actually commit — the commit may even have warned you about it, and you may have confirmed to SVN that it was resolved.