Init

ConsoleApp2/Services/TaskManager.cs

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+using System.Collections.Concurrent;
+using Microsoft.Extensions.Logging;
+
+namespace ConsoleApp2.Services;
+
+public class TaskManager
+{
+    private readonly ConcurrentBag<Task> _tasks;
+    private readonly ILogger _logger;
+
+    public int RunningTaskCount => _tasks.Count(task => !task.IsCompleted);
+    public IReadOnlyCollection<Task> Tasks => _tasks;
+    public bool MainTaskCompleted { get; set; }
+
+    public TaskManager(ILogger<TaskManager> logger)
+    {
+        _tasks = new ConcurrentBag<Task>();
+        _logger = logger;
+    }
+
+    public Task<TResult> CreateTask<TResult>(Func<TResult> func)
+    {
+        var task = Task.Factory.StartNew(func);
+        _tasks.Add(task);
+        _logger.LogInformation("New task created.");
+        return task;
+    }
+}