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how to access counter in for loop

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hi to all
how can i acceess 'i' in for loop
thanks in advance
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication2._Default" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form runat="server">
        <div>
            <asp:DropDownList ID="aspMySelect" runat="server" OnSelectedIndexChanged="aspMySelect_SelectedIndexChanged" AutoPostBack="True">
            </asp:DropDownList>
 
            <asp:TextBox ID="aspNewOption" runat="server"></asp:TextBox>
            <asp:Button ID="Button1" OnClientClick="addAspPopUp()" runat="server" Text="Button" />
            <script type="text/javascript">
                function addAspPopUp() {
                    debugger
                    var optionText = document.getElementById('aspNewOption').value;
                    var textBox = document.getElementById('aspNewOption');
                    var objSelect = document.getElementById('aspMySelect');
                    
                    listCount=<%=objListItems.Count%>;
                    for (var i=0;i<=listCount;i++)
                    {
                        objSelect[objSelect.length] = new Option('<%=objListItems[i]%>');
                       
                        textBox.value = "";
                    }
                }
            </script>
            <input type="button" id="btnRegister" onclick="ConvertDate()" value="test" />
            <input type="button" id="Button2" onclick="addAspPopUp()" value="test2" />
        </div>
        <asp:Label ID="lbltest" runat="server"></asp:Label>
    </form>
</body>
</html>
 


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