Мне не известны какие-либо изменения, поэтому он должен работать как раньше. ContentOverride сигнализирует модулю рендеринга c (Eco.ViewModel.WinForms.ViewModelUserControl) вызвать событие OnColumnUIOverride со следующим аргументом:
/// <summary>
/// Arguments for the OnColumnUIOverrideArgs event; fired to allow for override of column render.
/// If you have other UI components that you want to use in ViewModel driven UI's this event provides
/// a hook point to inject them.
/// </summary>
public class OnColumnUIOverrideArgs : EventArgs
{
public ViewModel ViewModel;
/// <summary>
/// The Column in question
/// </summary>
public ViewModelColumn ViewModelColumn;
/// <summary>
/// What kind of UI we had in mind
/// </summary>
public ViewModelUIComponentType ViewModelUIComponentType;
/// <summary>
/// Set this to false to stop us from calling default logic
/// </summary>
public bool ContinueWithDefault;
}