Good afternoon. I have a strange problem. When iterating through the list, SortedDictionary does not recognize the key. Namely, it gives out that the key was not found. System.Collections.Generic.KeyNotFoundException

此外，只有当向列表中添加2个以上的元素时才会发出错误。同时，如果3个元素在1号上是错误的，如果5个元素在1号和3号上，4个元素在1号上。

public: Collections::Generic::SortedDictionary<Product_for_sale^, int> products;
 
void Score:: setProductsLabel() {
    int y = 50;
    productLabels.Clear();
    for each (Product_for_sale ^ key in products.Keys) {
        
        String^ product_by_score = "";
        System::Windows::Forms::Label^ info = (gcnew System::Windows::Forms::Label());
        
            if (products[key] > 0) {
                product_by_score = key->getName() + "       |       " + products[key] +
                    "        |        " + key->getFullPrice() * products[key] + "\n";
                info->BackColor = System::Drawing::Color::Red;
            }
            else {
                info->BackColor = System::Drawing::Color::PaleGreen;
                product_by_score = key->getName() + "       |       " + "СОБРАНО" +
                    "        |        " + key->getFullPrice() * products[key] + "\n";
            }
        
        
        
        info->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 10.00F, System::Drawing::FontStyle::Bold, System::Drawing::GraphicsUnit::Point,
            static_cast<System::Byte>(204)));
        info->AutoSize = true;
        info->Location = System::Drawing::Point(10, y);
        info->Name = L"label4";
        info->Size = System::Drawing::Size(100, 25);
        info->TabIndex = 2;
        info->Text = product_by_score;
        productLabels.Add(key,info );
 
        y += 30;
    }
    
    
 
}
 
//реализация сравнения в классе Product_for_sale
 
int Product_for_sale::equals(Product_for_sale^ pfs) {
    if (this->name->Equals(pfs->getName())) {
        return 0;
    }
    else return 1;
}
int  Product_for_sale::CompareTo(Object^ obj){
 
    if (obj->GetType() == Product_for_sale::typeid) {
        Product_for_sale^ product = dynamic_cast<Product_for_sale^>(obj);
 
        return equals(product);
    }
    else return 1;
//  throw gcnew ArgumentException("object is not a Score");
}

错误正好在表达式products[key]上崩溃，而key本身，您可以从对象中工作和获取数据。
我在入口处检查了列表的占用情况，一切都是正确的，无论是键还是值。同样，如果列表中有2对，一切都没有问题。