Display Count of Checked CheckBox on Page in Label in ASP.Net using C# and VB.Net

HTML

    <asp:Panel ID="Panel1" runat="server">
        <asp:CheckBox ID="CheckBox1" runat="server" Text = "Mango" />
        <asp:CheckBox ID="CheckBox2" runat="server" Text = "Apple" />
        <asp:CheckBox ID="CheckBox3" runat="server" Text = "Orange" />
        <asp:CheckBox ID="CheckBox4" runat="server" Text = "Banana" />
    </asp:Panel>
     <br />
    <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
    <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />

C#

    protected void Button1_Click(object sender, EventArgs e)
    {
        int count = 0;
        foreach (Control c in Panel1.Controls)
        {
            if (c is CheckBox && (c as CheckBox).Checked)
            {
                count++;
            }
        }
        Label1.Text = "Count: " + count;
    }

VB

Protected Sub Button1_Click(sender As Object, e As EventArgs)
	Dim count As Integer = 0
	For Each c As Control In Panel1.Controls
		If TypeOf c Is CheckBox AndAlso TryCast(c, CheckBox).Checked Then
			count += 1
		End If
	Next
	Label1.Text = "Count: " + count
End Sub