SumTaskTKey Class

public sealed class SumTask<TKey> : AccumulatorTask<TKey, int>
where TKey : Object, IComparable<TKey>

Public NotInheritable Class SumTask(Of TKey As {Object, IComparable(Of TKey)})
	Inherits AccumulatorTask(Of TKey, Integer)

generic<typename TKey>
where TKey : Object, IComparable<TKey>
public ref class SumTask sealed : public AccumulatorTask<TKey, int>

[<SealedAttribute>]
type SumTask<'TKey when 'TKey : Object and IComparable<'TKey>> = 
    class
        inherit AccumulatorTask<'TKey, int>
    end