private void SetStockItem(string key, object value)
{
List <StockItem> items = GetItemList();
using (FileStream stockFile = File.Create(FilePath))
{
if (items == null)
{
items = new List <StockItem>();
}
BinaryFormatter formatter = new BinaryFormatter();
StockItem item = items?.Where(i => i.Key == key).FirstOrDefault();
if (item != null)
{
item.Value = value;
}
else
{
items.Add(new StockItem(key, value));
}
formatter.Serialize(stockFile, items);
}
}