ODP.NET

I'm having problems reading data from queries producing many decimal places. What is the recommended way to read such data?

private static void OracleDecimalReaderTest()
{
    var csb = new OracleConnectionStringBuilder();
    csb.Add("Data Source", "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=xxxxx)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=xxxxx)))");
    csb.Add("User Id", "xxxxx");
    csb.Add("Password", "xxxxx");
    try
    {
        using (var connection = new OracleConnection())
        using (var command = connection.CreateCommand())
        {
            connection.ConnectionString = csb.ConnectionString;
            connection.Open();
            Console.WriteLine($"Oracle version: {connection.ServerVersion}");
            Console.WriteLine($"Assembly name: {System.Reflection.Assembly.GetAssembly(typeof(OracleConnection)).FullName}");
            command.CommandText = @"
SELECT
  1 / 3 AS value
FROM
  dual ";
                using (var reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        var value = reader.GetValue(0);
                        Console.WriteLine(value); // never get this far
                    }
                }
            }
        }
    catch (Exception ex)
    {
        Console.WriteLine(ex.Message + "\n" + ex.StackTrace);
    }
}

Result:

Oracle version: 12.1.0.2.0

Assembly name: Oracle.ManagedDataAccess, Version=4.122.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342

Die angegebene Umwandlung ist ungültig. (Specified cast is not valid.)

   bei Oracle.ManagedDataAccess.Client.OracleDataReader.GetDecimal(Int32 i)

   bei Oracle.ManagedDataAccess.Client.OracleDataReader.GetValue(Int32 i)

   bei Konsolentest.Program.OracleDecimalReaderTest() in D:\Eigene Dateien\Visual Studio Projekte\Konsolentest\Konsolentest\Program.cs:Zeile 267.

Any ideas?

Thanks, Bernd