public static IAdvancedHttpBuilder WithContentEncoding(this IAdvancedHttpBuilder builder, Encoding encoding)

        {
            if (encoding == null)
            {
                return(builder);
            }

            builder.WithConfiguration(s => s.ContentEncoding = encoding);
            builder.WithAcceptCharSet(encoding);

            return(builder);
        }
        public static IAdvancedHttpBuilder WithAcceptCharSet(this IAdvancedHttpBuilder builder, Encoding encoding)

        {
            return(builder.WithAcceptCharSet(encoding.WebName));
        }