WPF local: when using Dependency Injection

public enum Data
{
  Data1,
  Data2,
  Data3
}
public partial class MainWindow : Window
{
  private readonly ICustomWrapper _customWrapper;
  public MainWindow(ICustomWrapper customWrapper)
    {
      InitializeComponent();
    }  
  private Data _data;
  public Data data
    {
      get=> _data;
      set
        {
          _data = value;
          MessageBox.Show("The selected datum is: " + "value.ToString());
}    

public class SessionConverter : IValueConverter
{
  public object? Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
      return value?.Equals(parameter);
    }
  public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
      return value?.Equals(true) == true ? parameter : Binding.DoNothing;
    }
}

<Window x:Class="DataTest.MainWindow"
        xmlns:local="clr-namespace:DataTest"/>
<Window.Resources>
  <local:SessionConverter x:Key="SessionConverter"/>
</Window.Resources>
<Grid>
  <StackPanel>
    <RadioButton>
    </RadioButton>
  </StackPanel>
</Grid>