<PackageReference Include="Microsoft.Data.SqlClient" Version="7.1.0-preview3.26238.4" />

Microsoft.Data.SqlClient.SqlError

public sealed class SqlError
Collects information relevant to a warning or error returned by SQL Server.
namespace Microsoft.Data.SqlClient { public sealed class SqlError { public string Source { get; } public int Number { get; } public byte State { get; } public byte Class { get; } public string Server { get; } public string Message { get; } public string Procedure { get; } public int LineNumber { get; } } }