At Compile time DefaultValueAttribute won't impact the produced IL and it will not be go through to initialize the property to that worth (see DefaultValue attribute will not be working with my Vehicle Property). The issue is "what on earth is the real difference...", but quite possibly the most voted https://aiplsector88gurgaon.water.blog/2025/07/10/modern-serenity-awaits-at-aipl-sector-103-gurgaon/