ViewModelField<T>

ViewModelField.cs

public class ViewModelField<T> : INotifyPropertyChanged
{
    private T _value;
    public T Value
    {
        get { return _value; }
        set
        {
            _value = value;
            PropertyChanged(this, new PropertyChangedEventArgs("Value"));
        }
    }
    public event PropertyChangedEventHandler PropertyChanged = delegate { };
}