public IncomeCategory Create(IncomeCategory incomeCategory)
{
Contract.Requires <ArgumentException>(incomeCategory != null);
Contract.Requires <ArgumentException>(!string.IsNullOrWhiteSpace(incomeCategory.Name));
Contract.Requires <ArgumentException>(!Exists(incomeCategory.Name), $"Income category '{incomeCategory.Name}' is already defined");
_repository.Create(incomeCategory);
return(incomeCategory);
}
public void AddNewCategory(IncomeCategory category)
{
_repository.Create(category);
}