internal static List <T> GetAllItems <T>()
{
if (typeof(Company) == typeof(T))
{
return(Companies.Cast <T>().ToList());
}
if (typeof(Product) == typeof(T))
{
return(Products.Cast <T>().ToList());
}
if (typeof(Supplier) == typeof(T))
{
return(Suppliers.Cast <T>().ToList());
}
if (typeof(SupplierProductBarcode) == typeof(T))
{
return(SupplierProductBarcodes.Cast <T>().ToList());
}
return(null);
}