BelhardTraining.Extensions.DbDataReaderExtensions.GetNullableDouble C# (CSharp) Метод

        public static double? GetNullableDouble(this DbDataReader reader, string columnName)
        {
            int columnIdx = reader.GetOrdinal("columnName");
            return reader.IsDBNull(columnIdx) ? null : (double?)reader.GetDouble(columnIdx);
        }