Fix bug where DD would exit prematurely

DepotDownloader/ContentDownloader.cs

@@ -3,12 +3,10 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Net;
-using System.Net.Sockets;
 using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading;
 using SteamKit2;
-using System.Collections.Concurrent;
 using System.Threading.Tasks;
 
 namespace DepotDownloader
@@ -442,7 +440,7 @@ namespace DepotDownloader
 
             foreach (var depot in depotIDs)
             {
-                DepotDownloadInfo info = GetDepotInfo(depot, appId, branch);
+                var info = GetDepotInfo(depot, appId, branch);
                 if (info != null)
                 {
                     infos.Add(info);
@@ -678,10 +676,15 @@ namespace DepotDownloader
                 });
                 
                 var semaphore = new SemaphoreSlim(Config.MaxDownloads);
-                filesAfterExclusions.Where(f => !f.Flags.HasFlag(EDepotFileFlag.Directory))
-                    .AsParallel().WithCancellation(cts.Token).WithDegreeOfParallelism(Config.MaxDownloads)
-                    .ForAll(async file =>
+                var files = filesAfterExclusions.Where(f => !f.Flags.HasFlag(EDepotFileFlag.Directory)).ToArray();
+                var tasks = new Task[files.Length];
+                for (var i = 0; i < files.Length; i++)
                 {
+                    var file = files[i];
+                    var task = Task.Run(async () =>
+                    {
+                        cts.Token.ThrowIfCancellationRequested();
+
                         try
                         {
                             await semaphore.WaitAsync().ConfigureAwait(false);
@@ -883,6 +886,11 @@ namespace DepotDownloader
                         }
                     });
 
+                    tasks[i] = task;
+                }
+
+                await Task.WhenAll(tasks).ConfigureAwait(false);;
+
                 ConfigStore.TheConfig.LastManifests[depot.id] = depot.manifestId;
                 ConfigStore.Save();