Convert string to upper case and switch it (C#)

<%@ Page Language="C#" %>
<script runat="server">

void page_Load()
{
    if(Page.IsPostBack)
    {
        switch (txtIn.Text.ToUpper())
        {
            case "YES":
            case "Y":
            lblOut.Text= "Details will be sent.";
            break;
            case "NO":
            case "N":
            lblOut.Text= "We will not contact you.";
            break;
            default:
            lblOut.Text= "Your answer " + txtIn.Text + " is not recognized.";
            break;
        } 
    }

}

</script>
<html>
    <head>
    </head>
    <body>
        <form runat="server">
            Please type yes or no: 
            <asp:TextBox runat="server" ID="txtIn"/><br/>
            <asp:Button runat="server" Text="Submit"/><br/>
            <asp:Label runat="server" ID="lblOut"/><br/>
        </form>
    </body>
</html>

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Convert string to upper case and switch it (C#) : Switch « Language Basics « ASP.Net

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