protected string ItemMetadataToString(IEnumerable<ItemData> items)
{
StringBuilder builder = new StringBuilder();
foreach (ItemData item in items) {
if (builder.Length > 0)
builder.Append(';');
builder.Append((int)item.Prefix);
builder.Append(',');
builder.Append((int)item.Type);
builder.Append(',');
builder.Append(item.StackSize);
}
return builder.ToString();
}