RadPropertyGrid - Custom DateTime field edit format.

private void RadPropertyGrid1_EditorInitialized(object sender, PropertyGridItemEditorInitializedEventArgs e)
{
    if (e.Editor is Telerik.WinControls.UI.PropertyGridDateTimeEditor editor)
    {
        BaseSpinEditorElement el = editor.EditorElement as BaseSpinEditorElement;
        BaseDateTimeEditorElement element = editor.EditorElement as BaseDateTimeEditorElement;
        element.Format = DateTimePickerFormat.Custom;
        element.CustomFormat = "dd/MM/yyyy";
    }
}

 public partial class RadForm1 : Telerik.WinControls.UI.RadForm
 {
     public RadForm1()
     {
         InitializeComponent();

         this.radPropertyGrid1.SelectedObject = new MyObject() { Date = DateTime.Today, Text = "Date:" };
         this.radPropertyGrid1.EditorRequired += this.RadPropertyGrid1_EditorRequired;
     }
     private void RadPropertyGrid1_EditorRequired(object sender, PropertyGridEditorRequiredEventArgs e)
     {
         if (e.EditorType == typeof(Telerik.WinControls.UI.PropertyGridDateTimeEditor))
         {
             e.Editor = new MyPropertyGridDateTimeEditor();
         }
     }
 }
 class MyObject
 {
     public string Text { get; set; }
     public DateTime Date { get; set; }
 }
 public class MyPropertyGridDateTimeEditor : Telerik.WinControls.UI.PropertyGridDateTimeEditor
 {
     public override void BeginEdit()
     {
         base.BeginEdit();
         BaseDateTimeEditorElement element = this.EditorElement as BaseDateTimeEditorElement;
         element.Format = DateTimePickerFormat.Custom;
         element.CustomFormat = "dd/MM/yyyy";
         MaskDateTimeProvider provider = element.TextBoxElement.Provider as MaskDateTimeProvider;

         provider.SelectNextEditableItem();
         element.TextBoxElement.TextBoxItem.SelectionStart = 3;
     }
 }