SparkClient/ViewModel/BaseWindow/HomeWindowVM.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using HandyControl.Controls;
namespace SparkClient.ViewModel.BaseWindow;

public class HomeWindowVM : BaseViewModel
{
   public ICommand ShowHelperPageCommand { get; }

   public HomeWindowVM()
   {
      ShowHelperPageCommand = new RelayCommand(ShowHelperPage);
   }

   public void ShowHelperPage(object parameter)
   {
      BaseControlVM vm = new BaseControlVM(new HelperPageVM());
      WindowManager.mainViewModel.Content = vm;
      WindowManager.openContent.Add(vm);
   }
}