Reading a text file word by word

Question

I have a text file containing just lowercase letters and no punctuation except for spaces. I would like to know the best way of reading the file char by char, in a way that

Answer 1

I would do something like this:

IEnumerable ReadWords(StreamReader reader)
{
    string line;
    while((line = reader.ReadLine())!=null)
    {
        foreach(string word in line.Split(new [1] {' '}, StringSplitOptions.RemoveEmptyEntries))
        {
            yield return word;
        }
    }
}

If to use reader.ReadAllText it loads the entire file into your memory so you can get OutOfMemoryException and a lot of other problems.