At compile time DefaultValueAttribute will likely not affect the produced IL and it won't be go through to initialize the property to that price (see DefaultValue attribute is not really working with my Vehicle Property). The concern is "what is the difference...", but by far the most voted answers answer https://navrajinfratechprojectsdwarkaexpressway.finance.blog/2025/07/10/top-reasons-to-invest-in-jms-low-rise-floors-sector-m9-gurgaon/