public bool AddBranch(Branch branch)//adds a branch
{
if (branch.branchAvailableDeliveryGuys <= 0)
{
throw new Exception("branch num delivery guys must be a positive number");
}
if (branch.branchNumber < 0)
{
throw new Exception("branch num must be a positive number");
}
if (branch.branchNumWorkers <= 0)
{
throw new Exception("branch num workers must be a positive number");
}
return(dal.AddBranch(branch));
}
