// Returns the properties of the specified component extended with 
// a CategoryAttribute reflecting the name of the type of the property.
public override System.ComponentModel.PropertyDescriptorCollection GetProperties(object component, System.Attribute[] attributes)
{
    PropertyDescriptorCollection props;
    if( attributes == null )
        props = TypeDescriptor.GetProperties(component);    
    else
        props = TypeDescriptor.GetProperties(component, attributes);    
    
    PropertyDescriptor[] propArray = new PropertyDescriptor[props.Count];            
    for(int i=0; i<props.Count; i++)           
    {                
        // Create a new PropertyDescriptor from the old one, with 
        // a CategoryAttribute matching the name of the type.
        propArray[i] = TypeDescriptor.CreateProperty(props[i].ComponentType, props[i], new CategoryAttribute(props[i].PropertyType.Name));
    }
    return new PropertyDescriptorCollection( propArray );
}

public override System.ComponentModel.PropertyDescriptorCollection GetProperties(object component)
{                     
    return this.GetProperties(component, null);
}

// This is the shadowed property on the designer.
// This value will be serialized instead of the 
// value of the control's property.
public Color BackColor
{
    get
    {
        return (Color)ShadowProperties["BackColor"];
    }
    set
    {
        if (this.changeService != null)
        {
            PropertyDescriptor backColorDesc =
                TypeDescriptor.GetProperties(this.Control)["BackColor"];

            this.changeService.OnComponentChanging(
                this.Control,
                backColorDesc);

            this.ShadowProperties["BackColor"] = value;

            this.changeService.OnComponentChanged(
                this.Control,
                backColorDesc,
                null,
                null);
        }
    }
}