// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002784/idbconnection-isnotconnectionopen

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Data.SqlClient;

public class Program

{

    public static void Main()

    {       

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

        {

            //C# Extension Method: IDbConnection - IsNotConnectionOpen

            var result1 = conn.IsNotConnectionOpen(); // return true

            conn.EnsureOpen();

            //C# Extension Method: IDbConnection - IsNotConnectionOpen

            var result2 = conn.IsNotConnectionOpen(); // return false

            Console.WriteLine(result1);

            Console.WriteLine(result2);

        }

    }

}