<PackageReference Include="System.Data.SqlClient" Version="4.8.0-preview3.19551.4" />

System.Data.Sql.SqlNotificationRequest

public sealed class SqlNotificationRequest
Represents a request for notification for a given command.
namespace System.Data.Sql { public sealed class SqlNotificationRequest { public string Options { get; set; } public int Timeout { get; set; } public string UserData { get; set; } public SqlNotificationRequest(); public SqlNotificationRequest(string userData, string options, int timeout); } }