Capture dropdownlist value changed

Hi Experts,

I am working on ASP.NET 2.0 using C#

I wanted to update label whenever my value is dropdown list changed.

I have written code which is not working.

Please guide me with the issue

Thanks

ASPX CODE

<asp:DropDownList ID="DropDownList1" runat="server" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
        <asp:ListItem>A</asp:ListItem>
        <asp:ListItem>B</asp:ListItem>
        <asp:ListItem>C</asp:ListItem>
        <asp:ListItem>D</asp:ListItem>
        <asp:ListItem>E</asp:ListItem>
</asp:DropDownList>

<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

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CODE BEHIND

protected void Page_Load(object sender, EventArgs e)
{

}

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
	string str = DropDownList1.SelectedValue;

	Label1.Text = str;
}

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