namespace VberZero.DomainService.AppGuids; public sealed class NullAppGuidManager : IAppGuidManager { public static NullAppGuidManager Instance { get; } = new NullAppGuidManager(); public string GetNextRecordId(int type) { return default; } public Task GetNextRecordIdAsync(int type) { return Task.FromResult(default(string)); } public int GetRecordIdType(string no) { return default; } public int GetGuidFromFile(AppGuidType type) { return default; } public Task GetGuidFromFileAsync(AppGuidType type) { return Task.FromResult(default(int)); } }