SBO | Funkcje 2 C#

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;

public class Wynik
{
    [Microsoft.SqlServer.Server.SqlProcedure]
    public static void wiersze(String tabela, out SqlInt32 ile)
    {
        try
        {
            ile = 0;
            SqlConnection conn = new SqlConnection("context connection=true");
            conn.Open();
            SqlCommand zap = new SqlCommand("SELECT count(*) FROM " + tabela, conn);
            SqlDataReader zapReader = zap.ExecuteReader();
            if (zapReader.HasRows)
            {
                zapReader.Read();
                ile = zapReader.GetInt32(0);
            }
        }
        catch (SqlException)
        {
            ile = -1;
        }
    }

    [SqlFunction(DataAccess = DataAccessKind.Read)]
    public static int? wiersze_f(SqlString tabela)
    {
        if (!String.IsNullOrEmpty(tabela.ToString()))
        {
            try
            {
                int? ile = 0;
                SqlConnection conn = new SqlConnection("context connection=true");
                conn.Open();
                SqlCommand zap = new SqlCommand("SELECT count(*) FROM " + tabela.ToString(), conn);
                SqlDataReader zapReader = zap.ExecuteReader();
                if (zapReader.HasRows)
                {
                    zapReader.Read();
                    ile = zapReader.GetInt32(0);
                }
                return ile;
            }
            catch (SqlException)
            {
                return -1;
            }
        }
        else return null;
    }


}