Stack Peek() method in asp.net c#

Stack Peek() Method
StackPeekMethod.aspx

<%@ Page Language="C#" AutoEventWireup="true" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        Stack colors = new Stack();

        colors.Push("Green");
        colors.Push("SeaGreen");
        colors.Push("MediumSeaGreen");
        colors.Push("DarkGreen");
        colors.Push("LawnGreen");

        Label1.Text = "Stack Elements... ";
        Label1.Text += "<font color=SlateBlue>";
        foreach (string color in colors)
        {
            Label1.Text += "<br />" + color;
        }
        Label1.Text += "</font>";

        Label1.Text += "<br /><br />Get the object at the top of the Stack";
        Label1.Text += "<br />without removing it using Peek() method.... <br />";
        Label1.Text += "<font color=SlateBlue>";
        Label1.Text += colors.Peek().ToString();
        Label1.Text += "</font>";

        Label1.Text += "<br /><br />After Call Peek() Method, Now Stack Elements... ";
        Label1.Text += "<font color=SlateBlue>";
        foreach (string color in colors)
        {
            Label1.Text += "<br />" + color;
        }
        Label1.Text += "</font>";

    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Stack Peek() Method - How to get the object at the top of the Stack without removing it</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:MidnightBlue; font-style:italic;">
            System.Collections.Stack Peek() Method
            <br /> How to get the object at the top of the Stack without removing it
        </h2>
        <hr width="625" align="left" color="Navy" />
        <br />
        <asp:Label
             ID="Label1"
             runat="server"
             ForeColor="MediumVioletRed"
             Font-Size="Large"
             Font-Names="Courier New"
             Font-Italic="true"
             Font-Bold="true"
             >
        </asp:Label>
        <br /><br />
        <asp:Button 
            ID="Button1"
            runat="server"
            OnClick="Button1_Click"
            Text="Test Stack Peek() Method"
            Height="45"
            Font-Bold="true"
            ForeColor="DodgerBlue"
            />
    </div>
    </form>
</body>
</html>
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