Read csv file as a vector

Hi I was trying to read a csv file, I would like to get a vector the inside of file like

head filetoread.csv 
    0610010K14Rik,0610011F06Rik,1110032F04Rik,1110034G24Rik,1500011B03Rik,1700019L03Rik,1700021K19Rik, blah,blah,...

in R session:

c <- read.csv("filetoread.csv")
> c
   [1] X0610010K14Rik  X0610011F06Rik  X1110032F04Rik 
...
> str(c)
'data.frame':   0 obs. of  2840 variables:
 $ X0610010K14Rik : logi 
 $ X0610011F06Rik : logi 
 $ X1110032F04Rik : logi 
 $ X1110034G24Rik : logi 
...

but I wanna something like:

> c
[1] "X0610010K14Rik" "X0610011F06Rik" "X1110032F04Rik" ...
 str(c)
 chr [1:2840] "X0610010K14Rik" "X0610011F06Rik" "X1110032F04Rik"...