public override IHeaders <AsciiString, ICharSequence> Add(IHeaders <AsciiString, ICharSequence> headers)
{
// Override the fast-copy mechanism used by DefaultHeaders
if (ReferenceEquals(headers, this))
{
ThrowHelper.ThrowArgumentException_HeadCantAddSelf();
}
if (headers is CombinedHttpHeadersImpl)
{
if (this.IsEmpty)
{
// Can use the fast underlying copy
this.AddImpl(headers);
}
else
{
// Values are already escaped so don't escape again
foreach (HeaderEntry <AsciiString, ICharSequence> header in headers)
{
_ = this.AddEscapedValue(header.Key, header.Value);
}
}
}
else
{
foreach (HeaderEntry <AsciiString, ICharSequence> header in headers)
{
_ = this.Add(header.Key, header.Value);
}
}
return(this);
}