dependency injection properties code example

Example 1: dependency injection

Class A   Class B   if A uses some methods of B then its a dependency injection

Example 2: dependency injection

public class CustomerService
{
    CustomerBusinessLogic _customerBL;

    public CustomerService()
    {
        _customerBL = new CustomerBusinessLogic(new CustomerDataAccess());
    }

    public string GetCustomerName(int id) {
        return _customerBL.ProcessCustomerData(id);
    }
}