Question

I am getting error

the modifier public is not valid for this item

this my code, please help me.

    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);
    }

Thanks,
Pradeep

Answer 1

Your interface declaration should look like this:

public interface test
{
    int test1(int x);
    string test1(string x);
    string test1(string x, int y);
}

Access modifiers are not valid on interface declarations:

Interfaces consist of methods,
properties, events, indexers, or any
combination of those four member
types. An interface cannot contain
constants, fields, operators, instance
constructors, destructors, or types.
It cannot contain static members.
Interfaces members are automatically
public, and they cannot include any
access modifiers.