// -------
/// <summary>
/// Writes some important about the TransactionItem into a string.
/// </summary>
public override string ToString()
{
return($"StoreKey: {StoreKey}; TransactionActivity: {TransactionActivity}; Key: {Key}; " +
$"Item: {Item.ToShortString()}; OldItem: {OldItem?.ToShortString()};");
}