Download text as file in ASP.NET
<p>I am trying to download some text output from the screen as a text file. Following is the code. It's working on some pages and not working at all on other pages. Can anyone please suggest what's wrong here?</p>

<pre><code>protected void Button18_Click(object sender, EventArgs e){
    Response.Clear();
    Response.Buffer = true;
    Response.ContentType = "text/plain";
    Response.AppendHeader("content-disposition", "attachment;filename=output.txt");

    StringBuilder sb = new StringBuilder();
    string output = "Output";
    sb.Append(output);
    sb.Append("\r\n");
    Response.Write(sb.ToString());
}
</code></pre>
