Key shortcut (hotkey) in Visual Studio to open a file inside your solution?

The accepted solution doesn’t work on the newer versions.
For Visual Studio 2022, and 2019, 2017 do the following:

Update 1:
Now, pressing Ctrl + Shift + T and typing the file name works!

Update 2:
Since Visual Studio 2019 now it’s possible to do a similar search via Ctrl + Q.
But it works slightly sloppy since it shows VS-related stuff as well.

Original answer:

1. Press these keys to open the “Go to” popup:
   Ctrl +
   ,
2. Type there:
   f Space Filename
3. Press Enter

Notes:

• We are writing f to make VS search only on files. We can
  also, use other letters. For more info type ? in the “Go to” popup.
• For more keys and for Visual Studio 2012 to 2015 take a look at this
  answer.