At compile time DefaultValueAttribute won't affect the generated IL and it won't be browse to initialize the property to that benefit (see DefaultValue attribute will not be dealing with my Auto Property). The problem is "what is the main difference...", but one of the most voted answers answer with "in https://toppropertiesgurgaon.design.blog/2025/07/11/live-in-peace-and-style-at-ganga-realty-liv-89-sector-89-gurgaon/