SingletonQueryTQuery, TQueryInstance - класс

public class SingletonQuery<TQuery, TQueryInstance> : IRoutedQuery<TQuery>
where TQueryInstance : new(), SingletonQuery<TQuery, TQueryInstance>

Public Class SingletonQuery(Of TQuery, TQueryInstance As {New, SingletonQuery(Of TQuery, TQueryInstance)})
	Implements IRoutedQuery(Of TQuery)

generic<typename TQuery, typename TQueryInstance>
where TQueryInstance : gcnew(), SingletonQuery<TQuery, TQueryInstance>
public ref class SingletonQuery : IRoutedQuery<TQuery>

type SingletonQuery<'TQuery, 'TQueryInstance when 'TQueryInstance : new() and SingletonQuery<'TQuery, 'TQueryInstance>> =  
    class
        interface IRoutedQuery<'TQuery>
    end