/// <summary>
/// Adds the specified instances to the index immediately. Add is similar to Update, but skips a check to see if the
/// item already exists.
/// </summary>
/// <param name="instances">The instances to add immediately.</param>
/// <returns>A task for asynchronous programming.</returns>
public virtual Task AddAsync(params TSearchResult[] instances)
{
Argument.NotNull(instances, nameof(instances));
this.Logger.Verbose($"Adding {instances.Count()} items of type {typeof(TSearchResult)} using {_context.GetType()}.");
return(_context.AddAsync(instances));
}
