At compile time DefaultValueAttribute is not going to influence the created IL and it won't be read to initialize the property to that benefit (see DefaultValue attribute isn't working with my Auto Property). @Kent points out that Properties will not be necessary to encapsulate fields, they could do a calculation https://m3mscosector114.health.blog/2025/06/13/ganga-realty-liv-89-a-fresh-perspective-on-modern-urban-living/