private SingletonTransaction()
{
transactions = new ObservableCollection <Transaction>();
sqlUpdate = new Data.SQLManager("SELECT * FROM Trasaction");
}
private SingletonUser()
{
users = new ObservableCollection <User>();
sqlUpdate = new Data.SQLManager("SELECT * FROM User");
}
private SingletonCustomer()
{
customers = new ObservableCollection <Customer>();
sqlUpdate = new Data.SQLManager("SELECT * FROM Customers");
}
private SingletonProduct()
{
products = new ObservableCollection <Product>();
sqlUpdate = new Data.SQLManager("SELECT * FROM Products");
}
