Get Available SQLServer and it's Database using C#.NET

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using SQLDMO;

using System.Data.SqlClient;

    public class DAL

    {       

        static Application SQLApplication = new ApplicationClass();

        static SQLServer server = new SQLServerClass();

        static StoredProcedure procedure = new StoredProcedureClass();

        static Database database = new DatabaseClass();

       //Get available SQLServers

        public static string[] getListOfServers()

        {

             NameList listSQLServer = SQLApplication.ListAvailableSQLServers();

             string[] serverName = new string[listSQLServer.Count];

            for (int i = 0; i < listSQLServer.Count; i++)

            {

                serverName[i] = listSQLServer.Item(i + 1);

            }

            return serverName;

        }

         //Get the Available Database

        public static string[] getDatabaseList()

        {

            //Initialize SQLDMO application interface

            List<string> listDatabase = new List<string>();

            foreach (Database database in server.Databases)

            {

                if (database.Name != null)

                {

                    listDatabase.Add(database.Name);

                }

            }

             return listDatabase.ToArray();

          }

        //Connect to the server.

        public static bool ConnectionToServer(string ServerName,string username, string password,bool WindowAuthentication)

        {          

            try

            {

                server.Name = ServerName;

                server.LoginSecure = WindowAuthentication;

                server.Connect(ServerName, username, password);

                return true;

            }

            catch (Exception ex)

            {

                throw new Exception(ex.Message);

            }

  }

        //Disconnect from server

        public static bool DisconnectFromServer()

        {

            try

            {

                server.DisConnect();

                return true;

            }

            catch(Exception ex)

            {

                throw ex;

            }

       }

        //Function excute the T-SQL commands from SQL File

        public static bool CreateDatabase(string sqlFile)

        {

            try

            {

                server.ExecuteImmediate(sqlFile, SQLDMO_EXEC_TYPE.SQLDMOExec_Default, sqlFile.Length);

                return true;

            }

            catch (Exception ex)

            {

                throw ex;

            }

        }

        ////Function excute the T-SQL commands from SQL File

        public static bool ExecuteFile(string sqlFile)

        {

            try

            {

    server.ExecuteImmediate(sqlFile, SQLDMO_EXEC_TYPE.SQLDMOExec_Default, sqlFile.Length);

             return true;

            }

            catch (Exception ex)

            {

                throw ex;

            }

       }

    }