Modified version of CallApi() Method from swagger-codegen generated C# client that allows using Cookie headers

ApiClient.cs

        /// <summary>
        /// Makes the HTTP request (Sync).
        /// </summary>
        /// <param name="path">URL path.</param>
        /// <param name="method">HTTP method.</param>
        /// <param name="queryParams">Query parameters.</param>
        /// <param name="postBody">HTTP body (POST request).</param>
        /// <param name="headerParams">Header parameters.</param>
        /// <param name="formParams">Form parameters.</param>
        /// <param name="fileParams">File parameters.</param>
        /// <param name="pathParams">Path parameters.</param>
        /// <param name="contentType">Content Type of the request</param>
        /// <returns>Object</returns>
        public Object CallApi(
            String path, RestSharp.Method method, List<KeyValuePair<String, String>> queryParams, Object postBody,
            Dictionary<String, String> headerParams, Dictionary<String, String> formParams,
            Dictionary<String, FileParameter> fileParams, Dictionary<String, String> pathParams,
            String contentType, Dictionary<String, String> cookieParams = null)
        {
            var request = PrepareRequest(
                path, method, queryParams, postBody, headerParams, formParams, fileParams,
                pathParams, contentType);

            // set timeout
            RestClient.Timeout = Configuration.Timeout;
            // set user agent
            RestClient.UserAgent = Configuration.UserAgent;
            // set cookies
            var cookies = new CookieContainer();
            foreach (var c in headerParams.Where(x => x.Key.Equals("Cookie", StringComparison.CurrentCultureIgnoreCase)))
            {
                var coso = c.Value.Split(new string[] { "; " }, StringSplitOptions.None);
                foreach (string cookiestr in coso)
                {
                    var k = cookiestr.Split('=');
                    if (k.Length < 2) continue;

                    if (k[1].Substring(k[1].Length - 1) == ";")
                    {
                        k[1] = k[1].Substring(0, k[1].Length - 1);
                    }
                    cookies.Add(new Uri(RestClient.BaseUrl.AbsoluteUri), new Cookie(k[0], k[1]));
                }
            }
            RestClient.CookieContainer = cookies;

            InterceptRequest(request);
            var response = RestClient.Execute(request);
            InterceptResponse(request, response);

            return (Object) response;
        }