Somehow, one of the lines in my source code became marked with a black arrow-shaped icon pointing to the right. I'm familiar with bookmarks and breakpoints, but I can't find a clue about this one. It is the top-most icon in the screenshot below.
What is the purpose of this symbol?
That icon indicates that the line is a Find Result from the last time you did a "Find In Files."
来源：https://stackoverflow.com/questions/30915869/in-visual-studio-2013-what-does-this-black-arrow-shaped-symbol-in-the-breakpoin