WPF Best Practices

# WPF Best Practices for [COMPANY_NAME]

## MVVM Architecture
- **Separation of Concerns**: Ensure View, ViewModel, and Model layers are strictly separated. Use `INotifyPropertyChanged` for data binding in ViewModels.
- **Commands**: Prefer `RelayCommand` or `DelegateCommand` over event handlers for user interactions. Example:
  ```csharp
  public ICommand SaveCommand => new RelayCommand(Save, CanSave);
  ```

## Performance Optimization
- **Virtualization**: Enable UI virtualization for `ListView` and `DataGrid` to improve rendering performance with large datasets.
- **Data Binding**: Use `Mode=OneWay` or `Mode=OneTime` where possible to reduce unnecessary updates.

## Maintainable Code
- **Dependency Injection**: Use a DI container (e.g., Microsoft.Extensions.DependencyInjection) to manage ViewModel lifetimes.
- **Unit Testing**: Mock ViewModels and test logic without UI dependencies. Example:
  ```csharp
  [Test]
  public void SaveCommand_Executes_WhenCanSaveIsTrue()
  {
      var vm = new CustomerViewModel();
      vm.SaveCommand.Execute(null);
      Assert.IsTrue(vm.IsSaved);
  }
  ```

## Recommended Tools
- **XAML Styler**: Auto-format XAML for consistency.
- **Live Visual Tree**: Debug UI elements in real-time using Visual Studio.

Apply these practices to enhance [TECH_STACK] integration and scalability.