bugs on skin

hi guys
i have an errore in Simple Texbox.ascx.cs  the problem is this :
/// <summary>
        ///  Gets or sets the skin to apply to the control.
        /// </summary>
        public string   SkinID
        {
where id SkinID it's giving me an errore (im using visual studio 2010 untimate) so when i put the mouse on it the visual studio says :

Warning 1 'NopSolutions.NopCommerce.Web.Modules.SimpleTextBox.SkinID' hides inherited member 'System.Web.UI.Control.SkinID'. To allow the current member override that implementation, add the override keyword, otherwise add the new keyword. C: \ Mondial \ NopCommerceStore \ Modules \ SimpleTextBox.ascx.cs 120 25 NopCommerceStore