สอบถามเรื่องการเขียนโปรแกรมแล้วนำมาใช้บน network c#.net(windows application)

 Sub Page_Load(sender As Object, e As EventArgs)
		Dim strConnString As String
		strConnString = "Server=localhost;Uid=sa;PASSWORD=;database=mydatabase;Max Pool Size=400;Connect Timeout=600;"
		objConn = New SqlConnection(strConnString)
		objConn.Open()

		If objConn.State = ConnectionState.Open Then
			Me.lblText.Text = "SQL Server Connected"
		Else
			Me.lblText.Text = "SQL Server Connect Failed"
		End IF
    End Sub

public static SqlConnection  ConnectSeniorDB()
        {  //MUSHI-PC\SQLEXPRESS
            string strConn = @"Data Source=MUSHI-PC\SQLEXPRESS;Initial Catalog=Thesis;User ID=sa;Password=1234";
            SqlConnection conn = new SqlConnection(strConn);
            return conn;
        }

 public static SqlConnection  ConnectSeniorDB()
        {  //MUSHI-PC\SQLEXPRESS
            string strConn = @"Data Source=192.168.88.82;Initial Catalog=Thesis;User ID=sa;Password=1234";
            SqlConnection conn = new SqlConnection(strConn);
            return conn;
        }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Unis.Class
{
    class DBConnString
        
    {
        public static string strConn = File.ReadAllText(@"Connect.txt");
        public static string UserName = "";

    }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace Unis.Class
{
    class DBConnString
        
    {
        public static string strConn = "Data Source=UMS-SERVDB;Initial Catalog=UNIS;Persist Security Info=True;User ID=sa;Password=1234";
 //public static string strConn = "Data Source=admin-PC\\admin\\SQLExpress;Initial Catalog=UNIS;Integrated Security=True"; 

        public static string UserName = "";

    }
}