linq - Get first element of a sequence that match condition or a default value

How to use Linq FirstOrDefault operator with condition
LinqFirstOrDefaultOperatorWithCondition.aspx

<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Linq" %>

<!DOCTYPE html>
<script runat="server">
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        string[] fruits = { "Manzana velvet", "Naranjo dulce", "Lychee", "Naranja", "Lamyai", "Kathon" };

        string firstOrDefaultFruitsItemStartsWithN = (from f in fruits
                                                     select f).FirstOrDefault(f => f.StartsWith("N"));

        string firstOrDefaultFruitsItemStartsWithD = (from f in fruits
                                                     select f).FirstOrDefault(f => f.StartsWith("D"));

        Label1.Text = "Fruits List: <br />";
        foreach (string names in fruits)
        {
            Label1.Text += names.ToString() + "<br />";
        }

        Label2.Text = "After Calling FirstOrDefault Operator With Condition [StartsWith('N')]: " + firstOrDefaultFruitsItemStartsWithN;
        Label2.Text += "<br /><br />After Calling FirstOrDefault Operator With Condition [StartsWith('D')]: " + firstOrDefaultFruitsItemStartsWithD;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>How to use Linq FirstOrDefault operator with condition</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:DarkBlue; font-style:italic;">
            Linq Standard Query Operator: Element Operator
            <br /> FirstOrDefault With Condition
            <br />How to get the first element of a sequence
            <br /> or a default value if no element is found
        </h2>
        <hr width="500" align="left" color="CornFlowerBlue" />
        <asp:Label
             ID="Label1"
             runat="server"
             Font-Size="X-Large"
             ForeColor="SaddleBrown"
             Font-Italic="true"
             >
        </asp:Label>
        <br />
        <asp:Label
             ID="Label2"
             runat="server"
             Font-Size="X-Large"
             ForeColor="DodgerBlue"
             Font-Italic="true"
             >
        </asp:Label>
        <br /><br />
        <asp:Button 
            ID="Button1"
            runat="server"
            OnClick="Button1_Click"
            Text="Test Linq Query Operator - FirstOrDefault"
            Height="45"
            Font-Bold="true"
            ForeColor="DodgerBlue"
            />
    </div>
    </form>
</body>
</html>
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