Unable to get newly created Logins from Remote SQL Server Instance using SMO & C#

Question

//Check if Login ID exist in SQL Server
var svr = new Server(InstanceName); // CONSTANT
var login = new Login(svr, LoginName); // CONSTANT

//If Login doesn't already exist
if (svr.Logins.Contains(LoginName)) // Unable to find newly created Login here
{
    //Login should be of type Sql Login
    login.LoginType = Microsoft.SqlServer.Management.Smo.LoginType.SqlLogin;
    login.PasswordPolicyEnforced = false;

    //Create the Login on the SQL Server with password: pa$$w0rd              
    login.ChangePassword(txtBoxNewPassword.Text.Trim());
    return;
}