I need to pass c# user defined object:

[DataContract]
public class SEmployeeIncome
{
    [DataMember]
    [OracleObjectMappingAttribute("CARDID")]
    public string CardId { get; set; }
    [DataMember]
    [OracleObjectMappingAttribute("INCOMETIME")]
    public string IncomeTime { get; set; }

}

as list to pl/sql function but oracle returns such error : {"Invalid parameter binding\r\nParameter name: p_employees_income"}

This is how i pass object list as parameter:

        var oracleParam = new OracleParameter();
        oracleParam.OracleDbType = OracleDbType.Array;
        oracleParam.Direction = ParameterDirection.Input;
        oracleParam.ParameterName = "p_employees_income";
        oracleParam.Size = entity.EmployeesIncome.Count();
        oracleParam.Value = entity.EmployeesIncome.ToArray() ;//SEmployeeIncome list

        oracleCommand.Parameters.Add(oracleParam);

and pl/sql function definition as:

Function search_delayed_employees (p_employees_income   employee_income ) 
return ics_types.result_cursor ;