linq - How to get difference between two sequences

Linq Except Operator - How to get a sequence representing the difference between two sequences
LinqExceptOperator.aspx

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

<!DOCTYPE html>
<script runat="server">
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        int[] nums1 = { 1, 2, 2, 3, 3, 4, 5, 5, 6, 7, 7, 8, 9, 9, 10 };
        int[] nums2 = { 1, 3, 3, 5, 7, 9, 9, 11, 13, 13 };

        Label1.Text = "Number List 1 (nums1):....... <br />";
        foreach (int n in nums1)
        {
            Label1.Text += n.ToString() + ", ";
        }

        Label1.Text += "<br /><br />Number List 2 (nums2):....... <br />";
        foreach (int n in nums2)
        {
            Label1.Text += n.ToString() + ", ";
        }

        var val = nums1.Except(nums2);
        Label2.Text = "<br />After Call Except Operator [nums1.Except(nums2)]:....... <br />";
        foreach (int n in val)
        {
            Label2.Text += n.ToString() + ", ";
        }

        var val2 = nums2.Except(nums1);
        Label2.Text += "<br /><br />After Call Except Operator [nums2.Except(nums1)]:....... <br />";
        foreach (int n in val2)
        {
            Label2.Text += n.ToString() + ", ";
        }
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Linq Except Operator - How to get a sequence representing the difference between two sequences</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:DarkBlue; font-style:italic;">
            Linq Standard Query Operator: Set Operator - Except
            <br />How to get a sequence representing the difference between two sequences
        </h2>
        <hr width="675" align="left" color="CornFlowerBlue" />
        <asp:Label
             ID="Label1"
             runat="server"
             Font-Size="X-Large"
             ForeColor="MediumSeaGreen"
             Font-Italic="true"
             >
        </asp:Label>
        <br />
        <asp:Label
             ID="Label2"
             runat="server"
             Font-Size="X-Large"
             ForeColor="Purple"
             Font-Italic="true"
             >
        </asp:Label>
        <br /><br />
        <asp:Button 
            ID="Button1"
            runat="server"
            OnClick="Button1_Click"
            Text="Test Linq Query Operator - Except"
            Height="45"
            Font-Bold="true"
            ForeColor="DodgerBlue"
            />
    </div>
    </form>
</body>
</html>
More c# linq examples