// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002769/idatareader-containscolumn

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Data;

using System.Data.Common;

using System.Data.SqlClient;

public class Program

{

    public static void Main()

    {

        string sql = "SELECT 1 AS IntColumn, 'FizzBuzz' AS StringColumn";

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

        {

            conn.Open();

            using (DbCommand command = conn.CreateCommand())

            {

                command.CommandText = sql;

                using (IDataReader reader = command.ExecuteReader())

                {

                    reader.Read();

​

                    //C# Extension Method: IDataReader - ContainsColumn

                    bool result1 = reader.ContainsColumn("IntColumn"); // return true;

                    bool result2 = reader.ContainsColumn("ABC"); // return false;

​

                    Console.WriteLine(result1);

                    Console.WriteLine(result2);

                }

            }

        }

    }

}