在运行时更改web.config连接字符串的最佳方法是什么？

 <connectionStrings>
    <add name="MyConnectionString" connectionString="Data Source=myServerAddress;Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;" providerName="System.Data.SqlClient" />
  </connectionStrings>
</configuration>

using System.Configuration;
using System.Data.SqlClient;

// 获取连接字符串
string connectionString = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;

// 更改连接字符串
SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(connectionString);
builder.DataSource = "newServerAddress";
builder.InitialCatalog = "newDataBase";
builder.UserID = "newUsername";
builder.Password = "newPassword";

// 使用更改后的连接字符串
using (SqlConnection connection = new SqlConnection(builder.ConnectionString))
{
    // 执行数据库操作
}