Implement Remember me CheckBox in Windows Application

I have one database which has the following data in the tblUser:

ID    UserName     UserPass   IsSelected

1       ABC             abc@123       1

2       SKY             sky@123        1

3       XYZ             xyz@123        1

Now these three users will login septately at same time using their own pc. 

I want to add Remember me functionality for each user seprately. Here is my code 

private void frmLogin_Load(object sender, EventArgs e)
{
    Remember();
}

private void Remember()
{
    con = new SqlDbConnect();
    con.SqlQuery("select UserName,UserPassword,IsSelected from tblUsers where IsSelected='1' or IsSelected='0'");
    // con.Cmd.Parameters.Add(new SqlParameter("@No", this.txtName.Text.Trim()));
    con.Rdr = con.Cmd.ExecuteReader();
    if (con.Rdr.Read())
    {
        txtUserName.Text = con.Rdr["UserName"].ToString();
        txtUserPass.Text = con.Rdr["UserPassword"].ToString();
        chkRem.Checked = Convert.ToBoolean(con.Rdr["IsSelected"].ToString());
    }
}

but it is showing me for one user.

how to fix it and get solution pls