public sealed class Indexer<T> : SparseMatIndexer<T>
where T : struct, new()

Public NotInheritable Class Indexer(Of T As {Structure, New})
	Inherits SparseMatIndexer(Of T)

generic<typename T>
where T : value class, gcnew()
public ref class Indexer sealed : public SparseMatIndexer<T>

[<SealedAttribute>]
type Indexer<'T when 'T : struct, new()> =  
    class
        inherit SparseMatIndexer<'T>
    end