namespace BotSharp.Abstraction.Files.Models; public class InstructFileModel : FileBase { /// /// File extension without dot /// [JsonPropertyName("file_extension")] [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] public string? FileExtension { get; set; } = string.Empty; /// /// External file url /// [JsonPropertyName("file_url")] [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)] public string? FileUrl { get; set; } = string.Empty; }