Simple CSS Parser in C#

The example below describes a simple CSS text parser to get certain values from CSS-class definitions:

using System.Collections.Generic;

namespace CSS
{
    public class Item
    {
        public string Class { get; set; }
        public int Left { get; set; }
        public int Top { get; set; }
        public int Width { get; set; }
        public int Height { get; set; }
        public string Image { get; set; }
    }

    public class Parser
    {
        string m_cssString;
        List m_items;

        public Parser()
        {
            m_items = new List();
        }

        public void parseCss(string css)
        {
            // remove all useless stuff and get the relevant tokens
            string[] tokens = css.Replace("\n", "").Replace("\t", "").Replace("\r", "").Replace(" ", "").Replace("px", "").Split('{', '}', ';');
            m_cssString = css;

            foreach (string token in tokens)
            {
                Item last = null;
                if (m_items.Count > 0)
                {
                    last = m_items[m_items.Count - 1];
                }

                if (token != string.Empty)
                {
                    if (token.StartsWith("."))
                    {
                        // class found
                        m_items.Add(new Item() { Class = token.Substring(1) });
                    }
                    else if (token.StartsWith("left") && last != null)
                    {
                        last.Left = int.Parse(token.Split(':')[1]);
                    }
                    else if (token.StartsWith("top") && last != null)
                    {
                        last.Top = int.Parse(token.Split(':')[1]);
                    }
                    else if (token.StartsWith("width") && last != null)
                    {
                        last.Width = int.Parse(token.Split(':')[1]);
                    }
                    else if (token.StartsWith("height") && last != null)
                    {
                        last.Height = int.Parse(token.Split(':')[1]);
                    }
                    else if (token.StartsWith("background-image") && last != null)
                    {
                        last.Image = token.Split('"')[1];
                    }
                }
            }
        }

        public List getItems()
        {
            return m_items;
        }

    }
}