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

Public MustInherit Class SparseMatIndexer(Of T As {Structure, New})

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

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