C # Secure use of LINQ for threads

Question

I have a program that constantly reads and analyzes a large stream of data from WebSocket. All parsing takes place in a single thread within the client, and the data is organized into a tree SortedSet<T>for quick work.

All data is added, updated and deleted without fail.

The problem occurs when I try to access data from another thread. It will work fine, but somewhere along the line there is a race condition that will be hit in a minute or two.

Consider this code (running on its own thread) to update the interface in real time:

private async Task RenderOrderBook()
{
    var book = _client.OrderBook;

    while (true)
    {
        try
        {
            var asks = book.Asks.OrderBy(i => i.Price).Take(5).OrderByDescending(i => i.Price);
            var bids = book.Bids.OrderByDescending(i => i.Price).Take(5);

            orderBookView.BeginInvoke(new MethodInvoker(() =>
            {
                ...omitted due to irrelevance
            }));

            await Task.Delay(500);
        }
        catch (Exception ex)
        {
            ex.ToString();
        }
    }
}

LINQ book. , i.Price (a decimal variable), , , i , null. , .

, , , LINQ OrderBy , node , , .

book.Asks book.Bids SortedSet<T> . node _asks.ToArray(), . , .

?

public PriceNode[] Asks
{
    get { return _asks.ToArray(); }
}

public PriceNode[] Bids
{
    get { return _bids.ToArray(); }
}

Answer 1

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