Braintree.QueryString.AppendRequest C# (CSharp) Method

        protected virtual QueryString AppendRequest(string parent, Request request)
        {
            if (request == null)
            {
                return this;
            }
            string requestQueryString = request.ToQueryString(parent);
            if (requestQueryString.Length > 0)
            {
                if (builder.Length > 0)
                {
                    builder.Append("&");
                }

                builder.Append(requestQueryString);
            }
            return this;
        }