/// <summary>
/// Add new values. Each item remains a separate array entry.
/// </summary>
/// <param name="headers">The <see cref="IHeaderDictionary"/> to use.</param>
/// <param name="key">The header name.</param>
/// <param name="value">The header value.</param>
public static void Append(this IHeaderDictionary headers, string key, StringValues value)
{
ParsingHelpers.AppendHeaderUnmodified(headers, key, value);
}
/// <summary>
/// Add new values. Each item remains a separate array entry.
/// </summary>
/// <param name="key">The header name.</param>
/// <param name="values">The header values.</param>
public void AppendValues(string key, params string[] values)
{
ParsingHelpers.AppendHeaderUnmodified(Store, key, values);
}