Problem with TextWriter and points.

Hello, friends.

I have this problem:

if i use TextWriter.WriteLine (Cursor.GetString("DESCRIPTION"))
and the value from the dababase I want to write is "Tomatoes. 1,5", with the point and the colon

when i later use TextReader.Readline i find two lines in the file.txt
first line "Tomatoes."
second line "1,5"

Anyone knows what i´m i doing bad ?

Thanks to all.