Gets a collection of custom HTTP headers to be sent by the HTML to Image converter to the web server 
            when the web page is requested from a URL. A custom HTTP header is defined by a name and a value pair
            that can be added to the collection using the Add(String, String) method of the HttpRequestHeaders property.
            The PersistentHttpRequestHeaders property can be set on true to instruct the converter to send the custom headers 
            each time an external resource (image, css, etc) referenced by the web page is requested. By default the PersistentHttpRequestHeaders
            property is false and the custom headers are not automatically sent to the web server when the web page resources are requested.
            The custom HTTP headers can be used to define cookies, authentication options, URL referrer or any other
            HTTP header to be sent to the web browser. The preferred method to send cookies is to use the HttpRequestCookies property.
            
Namespace: EvoPdfClient
Assembly: EvoPdfClient_NetCore (in EvoPdfClient_NetCore.dll) Version: 10.0.0
Syntax
Property Value
Type: NameValuePairsCollectionSee Also
