Lists the contents of local directory.

lls [ <directory> ]\[ <wildcard> ]

If directory is not specified, lists working directory. When wildcard is specified, it is treated as set of files to list. Otherwise, all files are listed.

lls *.html
lls d:\
lls

There is no equivalent for lls command in .NET assembly.

You can make use of local directory listing functions of your runtime environment. In .NET framework, you can use System.IO.Directory.GetFiles. In PowerShell, you can use also Get-ChildItem cmdlet.