Command Prompt "tree" shows Unicode in console but outputs to file in ASCII

The encoding that is generally used for the box-drawing characters is 850, but even that doesn't help on my Windows 8.1 system. I've only found one way around cmd's poor handling of text encodings: using a program that does handle encoding well, namely, PowerShell.

It's the > redirection that wrecks the characters, so we'll just suck up the tree output and jam it in a file without simple cmd redirection:

Invoke-Expression "tree" | Out-File "tree.txt"

Or, shorter:

iex "tree" > "tree.txt"

To create an instance of PowerShell that runs that command and then exits, use this in a command prompt or batch file:

powershell -command "iex \"tree\" > \"tree.txt\""

The resulting file can be viewed successfully in Notepad or by a normal type.