PropertyTModel, TValue - класс

public abstract class Property<TModel, TValue> : ViewModel<TModel>, 
	IProperty<TModel, TValue>, IProperty, INotifyPropertyChanged, IDataTemplateProvider
where TModel : class

Public MustInherit Class Property(Of TModel As Class, TValue)
	Inherits ViewModel(Of TModel)
	Implements IProperty(Of TModel, TValue), IProperty, 
	INotifyPropertyChanged, IDataTemplateProvider

generic<typename TModel, typename TValue>
where TModel : ref class
public ref class Property abstract : public ViewModel<TModel>, 
	IProperty<TModel, TValue>, IProperty, INotifyPropertyChanged, IDataTemplateProvider

[<AbstractClassAttribute>]
type Property<'TModel, 'TValue when 'TModel : not struct> =  
    class
        inherit ViewModel<'TModel>
        interface IProperty<'TModel, 'TValue>
        interface IProperty
        interface INotifyPropertyChanged
        interface IDataTemplateProvider
    end