Create Calender Webpart using Visual Studio in SharePoint 2010

using System;
using System.Collections.Generic;
using System.Web;
using System.Text;
using System.Web.UI.WebControls;
using System.Collections.Generic;
using System.Web.UI.WebControls.WebParts;
using System.Text;
using System.Web.UI;
using System.Runtime.InteropServices;
namespace CalenderWebpart
{
    [Guid("2483C4E6-F435-48af-B5BB-AD7343ED61CE")]
    public class CalenderWebpart: WebPart
    {
        protected override void CreateChildControls()
        {
            Calendar cldr = new Calendar();
            cldr.Enabled = true;
            cldr.ShowGridLines = true;
            cldr.ShowTitle = true;
            cldr.EnableViewState = true;
            cldr.SelectedDate = DateTime.Now;
        }
        public override void RenderControl(HtmlTextWriter writer)
        {
            RenderChildren(writer);
        }
    }
}