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Unchecked RadioButton programmatically in asp.net

How to unchecked RadioButton programmatically
RadioButtonUnChecked.aspx
<%@ Page Language="C#" %>

<!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 Page_Load(object sender, System.EventArgs e)
    {
        if(!this.IsPostBack)
        {
            RadioButton1.Checked = true;
        }
    }
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        RadioButton1.Checked = false;
        RadioButton2.Checked = false;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>How to unchecked RadioButton programmatically</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Navy">RadioButton Example: Unchecked</h2>
        <asp:Label 
             ID="Label1"
             runat="server"
             Font-Bold="true"
             ForeColor="Indigo"
             Text="Favorite Color?"
             >
        </asp:Label>
        <br />
        <asp:RadioButton 
             ID="RadioButton1" 
             runat="server"
             Text="LightBlue"
             GroupName="Colors"
             />
        <asp:RadioButton 
             ID="RadioButton2" 
             runat="server"
             Text="LightCoral"
             GroupName="Colors"
             />
        <br /><br />           
        <asp:Button 
             ID="Button1" 
             runat="server" 
             ForeColor="Indigo"
             Text="Unchecked RadioButton"
             OnClick="Button1_Click"
             Font-Bold="true"
             />
    </div>
    </form>
</body>
</html>






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