ManagementClass virtualSystemManagementService =
            new ManagementClass(@"rootvirtualizationv2:Msvm_VirtualSystemManagementService");

        ManagementBaseObject inParams =
            virtualSystemManagementService
                .GetMethodParameters("DefineSystem");

        // Add the input parameters.
        ManagementClass virtualSystemSettingData =
            new ManagementClass(@"rootvirtualizationv2:Msvm_VirtualSystemSettingData")
        {
            ["ElementName"] = "Test"
        };

        inParams["SystemSettings"] =
            virtualSystemSettingData.GetText(TextFormat.CimDtd20);

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