At Compile time DefaultValueAttribute will never affect the generated IL and it will not be go through to initialize the property to that value (see DefaultValue attribute is just not dealing with my Vehicle Property). @Kent details out that Properties will not be required to encapsulate fields, they may do https://maxestatessector36agurgaon.sport.blog/2025/03/28/trinity-sky-palazzos-gurgaons-luxury-benchmark/