Diference between constructor and class members initializing?

Question

Whats the difference between using constructor when instantiating with passing arguments:

Customer Costomer1 = new Customer(100, Mark, 5000);

And doing the same but without passing anything into constructor but simply instantiating members?

Customer Costomer1 = new Customer() { ID = 100, Name = "Mark", Salary = 5000, };

Which one is better and for what situations are they are good?

Will I be correct if I will say that constructor is when more work needs to be done when instantiating an object and member initializing is for a signing values for fields and properties only?

And if Im understanding this correctly why would you use second case with members if you can use constructor?

Answer 1

this is a syntax shortcut(will call default constructor)

Customer Costomer1 = new Customer() { ID = 100, Name = "Mark", Salary = 5000, }; 

equals to the follwing

Customer Costomer1 = new Customer()
Costomer1.ID = 100;
Costomer1.Name = "Mark";
Costomer1.Salary = 5000;