AzureML.ManagementSDK.CreateWorkspace C# (CSharp) Method

        public async Task<string> CreateWorkspace(string managementCertThumbprint, string azureSubscriptionId, string workspaceName, string location, string storageAccountName, string storageAccountKey, string ownerEmail, string source)
        {        
            // initial workspace is a made-up but valid guid.
            string reqUrl = string.Format(_azMgmtApiBaseUrl + "/e582920d010646acbb0ec3183dc2243a", azureSubscriptionId);

            HttpWebRequest httpReq = GetRdfeHttpRequest(managementCertThumbprint, reqUrl, "PUT");            
            
            string payload = jss.Serialize(new
                {
                    Name = workspaceName,
                    Region = location,
                    StorageAccountName = storageAccountName,
                    StorageAccountKey = storageAccountKey,
                    OwnerId = ownerEmail,
                    ImmediateActivation = true,
                    Source = source
                });
            httpReq.ContentLength = payload.Length;
            Stream stream = httpReq.GetRequestStream();
            byte[] buffer = Encoding.UTF8.GetBytes(payload);
            stream.Write(buffer, 0, buffer.Length);

            WebResponse resp = await httpReq.GetResponseAsync();                       
            StreamReader sr = new StreamReader(resp.GetResponseStream());
            string result = sr.ReadToEnd();
                        
            dynamic d = jss.Deserialize<object>(result);
            return d["Id"];
        }