c# - How to intersect two arrays

Array intersect
array-intersect.aspx

<%@ Page Language="C#" AutoEventWireup="true"%>  
  
<!DOCTYPE html>  
<script runat="server">  
    protected void Button1_Click(object sender, System.EventArgs e)  
    {
        int[] numbers = { 10,50,75};
        int[] morenumbers = { 50,65,75,400};

        Label1.Text = "numbers array.........<br />";
        foreach (int i in numbers)
        {
            Label1.Text += i.ToString() + "<br />";
        }

        Label1.Text += "<br />more numbers array.........<br />";
        foreach (int i in morenumbers)
        {
            Label1.Text += i.ToString() + "<br />";
        }

        var intersect = numbers.Intersect(morenumbers);

        Label1.Text += "<br />intersect of numbers array and more numbers array.........<br />";
        foreach (int i in intersect)
        {
            Label1.Text += i.ToString() + "<br />";
        }
    }  
</script>  
  
<html xmlns="http://www.w3.org/1999/xhtml">  
<head id="Head1" runat="server">  
    <title>c# example - array intersect</title>  
</head>  
<body>  
    <form id="form1" runat="server">  
    <div>  
        <h2 style="color:DarkBlue; font-style:italic;">  
            c# example - array intersect
        </h2>  
        <hr width="550" align="left" color="LightBlue" />    
  
        <asp:Label   
            ID="Label1"   
            runat="server"  
            Font-Size="Large"  
            >  
        </asp:Label>  
        <br />
        <asp:Button   
            ID="Button1"   
            runat="server"   
            Text="array intersect"  
            OnClick="Button1_Click"
            Height="40"  
            Font-Bold="true"  
            />  
    </div>  
    </form>  
</body>  
</html>
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