player can shoot bullet (crashes game when leaving map)

TanksServer/Services/BulletManager.cs

@@ -0,0 +1,32 @@
+using System.Collections;
+using TanksServer.Models;
+
+namespace TanksServer.Services;
+
+internal sealed class BulletManager : ITickStep
+{
+    private readonly HashSet<Bullet> _bullets = new();
+
+    public void Spawn(Bullet bullet) => _bullets.Add(bullet);
+
+    public Task TickAsync()
+    {
+        foreach (var bullet in _bullets)
+        {
+            MoveBullet(bullet);
+        }
+
+        return Task.CompletedTask;
+    }
+
+    private static void MoveBullet(Bullet bullet)
+    {
+        var angle = bullet.Rotation / 16 * 2 * Math.PI;
+        bullet.Position = new FloatPosition(
+            X: bullet.Position.X + Math.Sin(angle) * 3,
+            Y: bullet.Position.Y - Math.Cos(angle) * 3
+        );
+    }
+
+    public IEnumerable<Bullet> GetAll() => _bullets;
+}