/// <summary>
/// Initializes a new instance of the class.
/// </summary>
protected HistoryDbContextBase()
{
DbContextHelper = NullHistoryDbContextHelper <DbContext> .Instance;
}
/// <summary>
/// Initializes a new instance of the class.
/// </summary>
/// <param name="options">The options to be used by a <see cref="DbContext"/>.</param>
protected HistoryDbContextBase(DbContextOptions options) : base(options)
{
DbContextHelper = NullHistoryDbContextHelper <DbContext> .Instance;
}
