Batch - Write output of DIR to a variable

Question

I have to store the ouput of DIR in a variable.

This was asked before e.g. here or here or here.

They all provide an answer more or less similar

Answer 1

for /f "delims=" %%a in ('dir /s /b *.sln') do set "name=%%a"

indeed is the most efficient method (you can process the output of a command directly, no need for a temporary file).
%name% will contain the full qualified file name of your file (or the last of the files, if there are more than one)