/// <summary>
/// Reads a color from an XML reader at a color tag.
/// </summary>
/// <param name="reader"> A <see cref="XmlReader"/> at a color tag. </param>
protected virtual void ReadColor(XmlReader reader)
{
string name = reader.GetRequiredString("name");
// parse the value
string valueString = reader.GetRequiredString("value");
colors[name] = Color.FromString(valueString);
colors[name].Name = name;
// Console.WriteLine("read color string {0} as {1}", valueString, colors[name]);
}