Azure Autoscaling (400) Bad Request - azure

Question

I try to increase my instance count by code behind.
First of all I created one .cer file and .pfx file and I upload it into .pfx to cloudservice certificates and .cer to settings --> management certificates.
After I used .cer file in my code. I don't know very well this uplod file is it true ?
Here is my code :
string subscriptionId = "c034e905-......";
string serviceName = "multitenant";
string configFileName = "ServiceConfiguration.cscfg";
string roleName = "Multi.Web";
XNamespace xs = "http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration";
XDocument configDocument = XDocument.Parse(String.Join("", File.ReadAllLines(Path.GetFullPath(configFileName))));
XAttribute instanceCountAttribute = configDocument.Element(xs + "ServiceConfiguration")
.Elements(xs + "Role")
.Where(xRole => xRole.Attribute("name").Value == roleName).SingleOrDefault()
.Element(xs + "Instances")
.Attribute("count");
int currentInstanceCount = int.Parse(instanceCountAttribute.Value);
and I am checking some fields in my VM and I incease my currentInstanceCount .
double processorTotal = Convert.ToDouble(performanceCounter.CounterValue);
instanceCountAttribute.Value = (currentInstanceCount + 1).ToString();
var serviceManagment = ServiceManagementHelper.CreateServiceManagementChannel("WindowsAzureEndPoint",
new X509Certificate2("multitenant.cer"));
var changeConfigInput = new ChangeConfigurationInput();
changeConfigInput.Configuration = ServiceManagementHelper.EncodeToBase64String(configDocument.ToString());
try
{
serviceManagment.ChangeConfigurationBySlot(subscriptionId, serviceName, "Production", changeConfigInput);
}
catch (WebException e)
{
throw new Exception(new StreamReader(e.Response.GetResponseStream()).ReadToEnd());
}
ChangeConfigurationBySlot method is throwing exception :
The remote server returned an unexpected response: (400) Bad Request.
Where am I wrong ? I couldn't understand. Is it about method parameters or wrong upload certificate ?
Do you have any estimate?
Thanks.

Answer 1

I solved my problem.
It is not about certification.First I get the production configuration file and I change it's current instance count and redeploy.
Here is the code :
var deployment = managementClient.GetDeploymentBySlot(subscriptionId, serviceName, "Production");
string configurationXml = ServiceManagementHelper.DecodeFromBase64String(deployment.Configuration);
serviceConfiguration = XDocument.Parse(configurationXml);
XNamespace xs = "http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration";
instanceCountAttribute = serviceConfiguration.Element(xs + "ServiceConfiguration")
.Elements(xs + "Role")
.Where(xRole => xRole.Attribute("name").Value == roleName).SingleOrDefault()
.Element(xs + "Instances")
.Attribute("count");
currentInstanceCount = int.Parse(instanceCountAttribute.Value);