Enable the display of line numbers in Visual Studio

Why doesn't Visual Studio have any way of showing line numbers in a source file? Is there any way to enable it, or a plugin for it? I know that the number of lines of code in a program doesn't matter, but sometimes it is nice to know how long a program is or the number of a particular line for reference.

Though I tried, I can't seem to find a way to enable line numbering and I find that surprising.

This is Visual Studio 2010 Ultimate. (If you have read my older questions, I've been using 2008 Express until now.)

Solution 1:

Visual Studio has line numbering:

Tools -> Options -> Text Editor -> All Languages -> check the "Line numbers" checkbox.

Solution 2:

As of Visual Studio 2015, you can find the option under:

Tools-> Options -> Text Editor -> All Languages-> General -> Line Numbers

Or simply go to tools -> options and type on the search bar: "Numbers".

Solution 3:

Tools -> Options -> Show All Settings -> Text Editor -> All Languages -> Line Numbers