public bool Exists(ModelBase obj)
{
if (obj is Account)
{
return(Accounts.Contains(obj));
}
else if (obj is Transaction)
{
return(Transactions.Contains(obj));
}
else if (obj is TransactionDetail)
{
return(TransactionDetails.Contains(obj));
}
else if (obj is Receipt)
{
return(Receipts.Contains(obj));
}
else if (obj is ScheduledTransaction)
{
return(ScheduledTransactions.Contains(obj));
}
else if (obj is ScheduledTransactionDetail)
{
return(ScheduledTransactionDetails.Contains(obj));
}
else if (obj is Category)
{
return(Categories.Contains(obj));
}
else if (obj is Product)
{
return(Products.Contains(obj));
}
else
{
return(false);
}
}