It's fairly trivial to write your own for any language, I have a c version where you simply start the file with "#!/usr/bin/env crun" the guts of the script is:

  gcc -x c -ggdb -Wall -Wextra -Wno-main -Wno-unused-parameter -o $out $CFLAGS -include $header - $LDFLAGS <<-CRUN_EOF 
    #line 2 "$1"
    $(tail +2 $1)
  CRUN_EOF

Obviously gcc would be replaced with csc, you wouldn't need CFLAGS and you might need a temp file or something.