Wrap long string in C#

Today I was think how to optimize the drawing string method on my library... so far I worked out this... However I still couldn't workout how to really wrap long string within the sentence...

Any help?

public static string[] WrapString(this Graphics gx, Font font, string text, float maxWidth, bool wrap)
{
    // find if actual max text width is smaller than max width or maxWidth is smaller than zero or wrap is set to false
    if (gx.MeasureString(text, font).Width < maxWidth || maxWidth <= 0 || !wrap)
    {
        return text.Split(new char[] { '\n' });
    }

    int maxChars = (int)(maxWidth / (gx.MeasureString("ABCDEFGHIJKLMNOPQRSTUVWXYZ.0123456789", font).Width / 37));
    //text = text.BreakLongString(maxChars);

    text = text.Replace(Environment.NewLine, "\n");
    text = text.Replace("\r", "");
    text = text.Replace("\t", " ");

    string[] words = text.Split(new char[] { ' ' });
    List lines = new List((int)(text.Length / maxChars));
    string currentLine = "";

    for (int i = 0; i < words.Length; i++)
    {
        // if the word is empty, then repace it to one space
        if (string.IsNullOrEmpty(words[i]))
            words[i] = " ";

        float currWidth = gx.MeasureString(currentLine + " " + words[i], font).Width;
        
        // check if the current width is greater than max length
        if (currWidth < maxWidth)
        {
            // if first entry, then put current line to the first word
            if ((lines.Count == 0) && string.IsNullOrEmpty(currentLine))
                currentLine = words[i];
            else
            {
                // if not, append each word to current line
                currentLine += " " + words[i];

                // check if the currentline has \n in there.
                string[] newLines = currentLine.Split('\n');
                // if it does, then add a new line
                if (newLines.Length > 1)
                {
                    // do not loop to last as it will be the new currentline
                    for (int j = 0; j < newLines.Length - 1; j++)
                        lines.Add(newLines[j]);

                    // the current line is the last line of the new lines
                    currentLine = newLines[newLines.Length - 1];
                }
            }
        }
        else
        {
            // if the currentline width is greater than max width
            // then add a new line to the list
            if (!string.IsNullOrEmpty(currentLine))
                lines.Add(currentLine);

            // make the current line to the last word
            currentLine = words[i];
        }
    }
    
    // if still has word, add it to the list
    if (!string.IsNullOrEmpty(currentLine))
        lines.Add(currentLine);

    return lines.ToArray();
}