RoutedCommandTCommand, TContext - класс

public abstract class RoutedCommand<TCommand, TContext> : IRoutedCommand
where TCommand : new(), RoutedCommand<TCommand, TContext>

Public MustInherit Class RoutedCommand(Of TCommand As {New, RoutedCommand(Of TCommand, TContext)}, TContext)
	Implements IRoutedCommand

generic<typename TCommand, typename TContext>
where TCommand : gcnew(), RoutedCommand<TCommand, TContext>
public ref class RoutedCommand abstract : IRoutedCommand

[<AbstractClassAttribute>]
type RoutedCommand<'TCommand, 'TContext when 'TCommand : new() and RoutedCommand<'TCommand, 'TContext>> =  
    class
        interface IRoutedCommand
    end