Facing error "System.IO.FileNotFoundException:"

Question

I am a C guy and new to C#, I have to debug an error in my project code. Need help from C# experts, I read some articles on SO, but was not able to find solution.

I installed SQL 2012 express edition on my Windows 2012 server machine and was trying to run the below code. Used Visual Studio 2010.

using System;
using System.Management;

public class Example
{
    public static void Main()
    {
        ManagementScope scope = new ManagementScope(@"\\" + Environment.MachineName + @"\root\Microsoft\SQLServer\ComputerManagement11");

        string instanceName, ipAddressName, propertyName, protocolName;
        using (ManagementClass networkProtocolMan = new ManagementClass(scope, new ManagementPath("ServerNetworkProtocolProperty"), null))
        {
            networkProtocolMan.Get();
            Console.WriteLine("" + networkProtocolMan.Path);         
            ManagementObjectCollection moCollection = networkProtocolMan.GetInstances(); //Class gets filled with error here
                                                                                        //used debugger to look inside moCollection   
            Console.WriteLine(""+moCollection.Count); //Error is getting printed on console here
            ManagementObject mo;
            ManagementObject protocolProperty = null; ;
        }
        return;
    }
}

The error which I get is:

System.IOFileNotFoundException:

at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal at System.Runtime.InteropServices.Marshal.ThrowExceptionForHR at System.Management.ManagementObjectCollection.ManagementObjectEnumeration.moveNext<>

at System.Management.ManagementObjectCollection.get_Count<>

After putting breakpoints I see that in moCollection->Count value is

'moclooection.Count' threw an exception of type 'System.IO.FileNotFound' and type is: int{System.IO.FileNotFoundException}

I was not able to post the debugger screenshot here, so I tried it to describe as above. Please guide me to resolve this error.