Cancelationtoken method

gistfile1.cs

async Task<int> ProcessObjectsAsync(List<SomeObjects> objectList, IProgress<int> progress,CancellationToken ct)
{
    int processCount = await Task.Run<int>(() =>
    {
        foreach (var someObject in objectList)
        {
            ct.ThrowIfCancellationRequested();
            // process next thing
        }
    }, ct);
    
    return processCount;
}