// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002760/connectionstate-in

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Data.SqlClient;

using System.Collections.Generic;

using System.Data;

public class Program

{

    public static void Main()

    {

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

        {       

            //C# Extension Method: ConnectionState - In

            bool result1 = conn.State.In(ConnectionState.Closed, ConnectionState.Open); // return true;

            bool result2 = conn.State.In(ConnectionState.Open, ConnectionState.Executing); // return false;

            Console.WriteLine(result1);

            Console.WriteLine(result2);

        }

    }

}