Public Sub DeleteAllOnSubmit(Of TSubEntity As ) ( _
    entities As IEnumerable(Of TSubEntity) _
)

Dim instance As Table
Dim entities As IEnumerable(Of TSubEntity)

instance.DeleteAllOnSubmit(entities)

public void DeleteAllOnSubmit<TSubEntity>(
    IEnumerable<TSubEntity> entities
)
where TSubEntity : 

public:
generic<typename TSubEntity>
where TSubEntity : 
void DeleteAllOnSubmit(
    IEnumerable<TSubEntity>^ entities
)

JScript does not support generic types or methods.