<UserControl.Resources>

<DataTemplate x:Key="MenuDataTemplate">
           <StackPanel Orientation="Horizontal">
                <Border Padding="0">
                    <StackPanel Orientation="Horizontal">
                        <TextBlock Text="{Binding Path=MenuName}"/>
                    </StackPanel>
                </Border>
            </StackPanel>
              
        </DataTemplate>
    </UserControl.Resources>

  <ig:XamMenu x:Name="MainMenu"
               VerticalAlignment="Top"
               MenuOrientation="Horizontal"
               ItemTemplate="{StaticResource MenuDataTemplate}"
               ItemsSource="{Binding Path=userMenuItems}"
               HorizontalAlignment="Stretch"
            >
            <i:Interaction.Triggers>
                <i:EventTrigger EventName="ItemClicked">
                    <i:InvokeCommandAction  Command="{Binding Path=SwitchPageCommand}" CommandParameter="{Binding Path=MenuName}" />
                </i:EventTrigger>
            </i:Interaction.Triggers>

            <ig:XamMenu.HierarchicalItemTemplate>
                <ig:HierarchicalDataTemplate ItemTemplate="{StaticResource MenuDataTemplate}"
                                             ItemsSource="{Binding Path=Children}"
                                             >
                    <ig:HierarchicalDataTemplate.DefaultItemsContainer>
                        <DataTemplate>
                            <ig:XamMenuItem>
                                <ig:XamMenuItem.Icon>
                                    <Image Source="{Binding MenuImageURL}" />
                                </ig:XamMenuItem.Icon>
                            </ig:XamMenuItem>
                        </DataTemplate>
                    </ig:HierarchicalDataTemplate.DefaultItemsContainer>
                </ig:HierarchicalDataTemplate>
            </ig:XamMenu.HierarchicalItemTemplate>
        </ig:XamMenu>

ViewModel Code :

 public ICommand SwitchPageCommand { get; private set; }

SwitchPageCommand = new DelegateCommand(executeAction: param => MenuItemClick(param), canExecute: delegate { return true; });

public void MenuItemClick(object menuID)
        {

// function is called but not giving any parameter values

        }

Model Class:

 [DataContract]
    public class MenuDataItem
    {

        [DataMember]
        public string MenuName
        {
            get;
            set;
        }

     
        [DataMember]
        public int? MenuId
        {
            get;
            set;
        }

        //[DataMember]
        //public int? ParentId
        //{
        //    get;
        //    set;
        //}

        [DataMember]
        public string MenuImageURL
        {
            get;
            set;
        }

        [DataMember]
        public List<MenuDataItem> Children
        {
            get;
            set;
        }
    }

May I know what should we make a change to correct it.