C# Object-Oriented Paradigm - Doubts

Well, if you really want to have global variables, you can still do that, just set up a static class and create a collection of public static variables within that class.  You can access them (read/write) from anywhere in the application.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

 

namespace GlobalVariables

{

    public static class GlobalVars

    {

        public static string sUserName;

        public static string sPassword;

    }

}

Or, you could create user scoped settings in you application's properties and use those like you would have used global variables. 

private void btnPropertySetting_Click(object sender, EventArgs e)

{

Properties.Settings.Default.MyGlobalVariable = "Wonderpig flies again";

Properties.Settings.Default.Save();

 

MessageBox.Show(Properties.Settings.Default.MyGlobalVariable);

}