Is AppendHeader exactly the same as AddHeader?
<p>We use ASP.Net 4.0. In our code we regularly use <code>Response.AddHeader("x", "y")</code>. Is this exactly the same as <code>Response.AppendHeader("x", "y")</code>? I read that AppendHeader only exists for compatibility with classic ASP, which we do not use.</p>

<p>Can we, without any concerns, replace AddHeader with AppendHeader?</p>
