how do I open two instances of visual studio code with the same folder?

[snippsat]

To duplicate current folder when in VS Code File --> Duplicate Workspace

Open in current folder from shell,this is what i always use.
Then can use Duplicate Workspace,when open in VC Code.

C:\div_code
λ code .

To force a open a new window

C:\div_code
λ code -n

# Or just
C:\div_code
λ code

More.

# Open a folder with path given
C:\
λ code G:\div_code\foo

# Open parent folder,also this open C:\div_code
C:\div_code\answer
λ code ..

# <code> is cli tool so it dos has --help
C:\
λ code --help