Set VLAN ID on a virtual machine network on Windows 2012

Question

I'm currently working in C# consuming Hyper-V V2 WMI API to do different tasks related to virtual machines. I've not been able to figure out how to get/set VLAN ID. I've found many links on net pointing to PS HyperV lib exploring "Get-VMNICVLAN"
and "Set-VMNICVLAN" but they dont seem to be working from me as Nic.connection[0] always seem to be null in my case. Perhaps that only works with Windows 2008 Hyper-V.  
Also I'm not familiar with WMI scripts much so converting that code to C# is being a pain. Can someone please tell me exactly how to do so in C# using WMI.
Regards
Usman

Answer 1

Hello Brian
Thanks for your reply. Perhaps V1 and V2 are not only namespaces since there are many class names, method names, parameter names are different, or perhaps I didnt work with the standard way with V1. Like "msvm_VirtualSwitch" changed to "msvm_VirtualEthernetSwitch",
"msvm_VirtualSystemGlobalSettingData" to "msvm_VirtualSystemSettingData" and specific for VLAN "Msvm_VLANEndpointSettingData" to "MSVM_EthernetSwitchPortVLanSettingData" and many more places.
I would easily set VLANID using code below in V1
string szArg = szArg = "NetworkVSP:" + szSwitch + @"\\" + szSwitchPort;
ManagementObject vlansettingdata = this.wmi.GetWmiObject("Msvm_VLANEndpointSettingData", "InstanceID Like 'Microsoft:{0}%'", new object[] { szArg });
vlansettingdata.SetPropertyValue("AccessVLAN", nVlanid);
vlansettingdata.Put();
But now even having reached the vlansettingdata object in V2, I get a "Generic Error" on calling vlansettingdata.Put(); Here's a snippet of code I'm using in V2, which may be wrong
ManagementObjectCollection vlansSettings = switchPortObj.GetRelated("MSVM_EthernetSwitchPortVLanSettingData");
ManagementObject vlanSettingsData = null;
if (vlansSettings != null)
foreach (ManagementObject settingData in vlansSettings)
if (settingData != null)
vlanSettingsData = settingData;
break;
if (vlanSettingsData != null)
vlanSettingsData.SetPropertyValue("OperationMode", "1");
vlanSettingsData.SetPropertyValue("AccessVLANID", nVlanid);
vlanSettingsData.Put();
IsVlanSet = true;
Forgive my ultimately dirty raw code, its just part of a test app that's getting uglier with desperate attempts to succeed.
Regards
Usman