The script below (also here as a gist) is a batch-file (so works on Windows) to combine all of the text files in a directory into a single csv, one line per text file.
@echo off
setlocal EnableDelayedExpansion
if exist result.csv del result.csv
for %%f in (*.txt) do (
set i=0
for /F "delims=" %%l in (%%f) do (
set /A i+=1
set line!i!=%%l
)
echo %%f, !line1!, !line2!, >> result.csv
)