CREATE OR REPLACE PACKAGE pkg IS
TYPE indx2 IS TABLE OF NUMBER INDEX BY PLS_INTEGER;
TYPE massiv IS TABLE OF indx2 INDEX BY PLS_INTEGER;
mas massiv;
FUNCTION PrintMas RETURN massiv;
END pkg;
/

CREATE OR REPLACE PACKAGE BODY pkg IS
FUNCTION PrintMas RETURN massiv IS
mas massiv;
BEGIN
mas(1)(1):=2;  mas(1)(2):=4;  mas(1)(3):=1; mas(1)(4):=0; mas(1)(5):=0; mas(1)(6):=64; mas(1)(7):=0;
mas(2)(1):=1;  mas(2)(2):=2;  mas(2)(3):=0; mas(2)(4):=1; mas(2)(5):=0; mas(2)(6):=70; mas(2)(7):=0;
mas(3)(1):=0;  mas(3)(2):=-1; mas(3)(3):=0; mas(3)(4):=0; mas(3)(5):=1; mas(3)(6):=18; mas(3)(7):=0;
mas(4)(1):=-5; mas(4)(2):=-7; mas(4)(3):=0; mas(4)(4):=0; mas(4)(5):=0; mas(4)(6):=0;  mas(4)(7):=0;
RETURN(mas);
END PrintMas;
END pkg;
/

using Oracle.DataAccess.Client;
using Oracle.DataAccess.Types;

            OracleConnection conn = new OracleConnection(@"Data Source=
                                                            (DESCRIPTION=
                                                            (ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521)))
                                                            (CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=XE)));
                                                            User Id=scott;Password=TIGER;");
            conn.Open();
            OracleCommand comand = new OracleCommand("pkg.PrintMas", conn);
            comand.CommandType = CommandType.StoredProcedure;
            comand.Parameters.Add("mas", OracleDbType.Object).Direction = ParameterDirection.ReturnValue;
            comand.ExecuteNonQuery();
            label1.Text += "\r";
            label1.Text += comand.Parameters["mas"].Value.ToString();

comand.ExecuteNonQuery();

comand.Parameters.Add("mas", OracleDbType.Array).Direction = ParameterDirection.ReturnValue;