Double # [ "

I assume you mean CF Builder on Visual Studio Code. I shall also assume you're on Windows.

You can switch off #-auto-pairing in Visual Studio Code, either for the editor, in general, or just for your particular workspace (which I recommend). You can do so by enabling the auto-pairings you need, but excluding #-auto-pairing. 

The steps are:

1.  In Visual Studio Code, press the keys CTRL + SHIFT + P to open the Command Palette.
2.  Scroll down the list and select the option "Preferences: Open Workspace Settings (JSON)".
   The current workspace settings (the default) should be something like:
   

   {"folders":[],"settings":{}}

3.  Replace that JSON with:
   

   {
       "folders": [],
       "settings": {
           "[AdobeCFML]": {
               "editor.autoClosingPairs": [
                   { "open": "\"", "close": "\"" },
                   { "open": "'", "close": "'" },
                   { "open": "(", "close": ")" },
                   { "open": "[", "close": "]" },
                   { "open": "{", "close": "}" },
                   {
                       "open": "<",
                       "close": ">",
                       "notIn": ["string"]
                   }
               ]
           }
       }
   }

   You will have noticed that # is not among the settings. That is the essence of the solution.

4.  Press the keys CTRL + S to save the settings.
5.  Test by stopping and restarting Visual Studio Code, opening a CFM or CFC file in your workspace, and typing code that contains #.