using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

public class myDate
{
    /// <summary>
    /// вернет 2014-01-17
    /// </summary>
    public static String propDate
    {
        get
        {
            return DateTime.Now.ToString("yyyy-MM-dd");
        }
    }

    ///<summary>
    ///вернет 2014-01-17
    ///</summary>
    public static String dtDate()
    {
        return DateTime.Now.ToString("yyyy-MM-dd");
    }


	public myDate()
	{
        //
	}
}

<%: Date.propDate %>
   //или
<%: Date.dtDate() %>