修改

ConsoleApp2/Services/TaskManager.cs

@@ -27,7 +27,13 @@ public class TaskManager
         _tasks.Add(task);
         _logger.LogDebug("New task created");
     }
-
+    public void CreateTasks<TResult>(Func<TResult> func,int taskCount, CancellationToken cancellationToken = default)
+    {
+        for (int i = 0; i < taskCount; i++)
+        {
+            CreateTask(func, cancellationToken);
+        }
+    }
     public async Task WaitAll()
     {
         await Task.WhenAll(_tasks);