/// <summary>
        /// Apply format rules to "body" part of request, and append it to inner string
        /// </summary>
        public void FormatBody()
        {
            var body = RequestHelpers.GetBodyContentAsStringAsync(_request).Result;

            if (body == null)
            {
                return;
            }
            _sb.AppendLine("=== BODY ===");
            _sb.AppendLine(body);
        }