r.cs

using System;
using System.Management;
using System.Windows.Forms;

namespace WMISample
{
    public class CallWMIMethod
    {
        public static void Main()
        {
            try
            {
                ManagementObject classInstance = 
                    new ManagementObject("root\\DEFAULT", 
                    "SystemRestore.ReplaceKeyPropery='ReplaceKeyPropertyValue'",
                    null);

                // Obtain in-parameters for the method
                ManagementBaseObject inParams = 
                    classInstance.GetMethodParameters("CreateRestorePoint");

                // Add the input parameters.
                inParams["Description"] =  "My test restore point";
                inParams["EventType"] =  100;
                inParams["RestorePointType"] =  0;

                // Execute the method and obtain the return values.
                ManagementBaseObject outParams = 
                    classInstance.InvokeMethod("CreateRestorePoint", inParams, null);

                // List outParams
                Console.WriteLine("Out parameters:");
                Console.WriteLine("ReturnValue: " + outParams["ReturnValue"]);
            }
            catch(ManagementException err)
            {
                MessageBox.Show("An error occurred while trying to execute the WMI method: " + err.Message);
            }
        }
    }
}