namespace VberZero.DomainService.Sqls; public sealed class NullSqlManager : ISqlManager { public static NullSqlManager Instance { get; } = new NullSqlManager(); public int Execute(string sql, params object[] parameters) { return default(int); } public Task ExecuteAsync(string sql, params object[] parameters) { return Task.FromResult(default(int)); } public List SqlQuery(string sql, params object[] parameters) where T : class, new() { return default(List); } public Task> SqlQueryAsync(string sql, params object[] parameters) where T : class, new() { return Task.FromResult(default(List)); } }