At Compile time DefaultValueAttribute is not going to influence the created IL and it won't be read to initialize the property to that worth (see DefaultValue attribute is not dealing with my Vehicle Property). @Kent points out that Properties are not needed to encapsulate fields, they could do a calculation https://maxestatessector36a.school.blog/2025/03/28/trump-towers-2-pinnacle-of-gurgaon-luxury/