// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002788/sqlcommand-executedatatable

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Data;

using System.Data.SqlClient;

public class Program

{

    public static void Main()

    {

        DataTable result;

        const string sql = @"

SELECT  1 AS A

UNION

SELECT  2

UNION

SELECT  3

";

        using (var conn = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            using (SqlCommand command = conn.CreateCommand())

            {

                conn.Open();

                command.CommandText = sql;

                //C# Extension Method: SqlCommand - ExecuteDataTable

                result = command.ExecuteDataTable(); // return DataSet (3 tables).

                conn.Close();

                Console.WriteLine(result.Rows.Count);

            }

        }

    }

}