using System;

​

public static class Program {

    public static void Main() {

        var con = new DAL.DadosConexao(true, null);

    }

}

​

namespace DAL {

    public class DadosConexao {

​

        private string servidor;

        private bool isServ;       

​

        public DadosConexao(bool isServ, string servidor) {

            this.isServ = isServ;

            this.servidor = servidor;

        }

​

        public string StringConexao {

            get {

                if (!isServ)

                    servidor = Environment.MachineName.ToString();

​

                return "Data Source=" + servidor + 

                       "\\MINHAINSTANCIA;" + 

                       "Initial Catalog=MINHABASE;" + 

                       "Persist Security Info=True;" + 

                       "User ID=sa;" + 

                       "Password=123456";

            }

        }

    }

}