the modifier public is not valid for this item
<p>I am getting error</p>

<blockquote>
  <p>the modifier public is not valid for this item</p>
</blockquote>

<p>this my code, please help me.</p>

<pre><code>    using System;
    using System.Configuration;
    using System.Data;
    using System.Linq;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;
    using System.Web.UI.HtmlControls;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Xml.Linq;
    public partial class First : System.Web.UI.Page,test 
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Label1.Text = test1("Hi", 1).ToString();
        }

    }
    public class Base
    {
        public int test1(int x)
        {
            return x;
        }
        public string test1(string x)
        {
            return x;
        }
        public string test1(string x, int y)
        {
            return x + y;
        }
    }
    public interface test
    {
        public int test1(int x);
        public string test1(string x);
        public string test1(string x, int y);
    }
</code></pre>

<p>Thanks,
Pradeep</p>
