At compile time DefaultValueAttribute will likely not effect the generated IL and it won't be read through to initialize the property to that value (see DefaultValue attribute isn't dealing with my Vehicle Property). @Kent points out that Properties usually are not required to encapsulate fields, they might do a calculation https://m3mprojectsindwarkaexpressway.blogspot.com/2025/06/jms-mega-city-sohna-redefining.html