c# string condtion is not working here
===

I have some email accounts in a if condition and making some simple decisions but this is not working here with me Please help me to find out the issue.Here is my code

     if (!this.IsPostBack)
                {
                    if ((lblemail.Text.Equals("ali.saleem@shakarganj.com.pk")) || (lblemail.Text.Equals("altaf.saleem@shakarganj.com.pk")) || (lblemail.Text.Equals("anjum.saleem@shakarganj.com.pk")) || (lblemail.Text.Equals("ibrahim.cheema@shakarganj.com.pk")) || (lblemail.Text.Equals("malik.adeel@shakarganj.com.pk")))
                    {
                        GridView2.Visible = true;
                        GridView1.Visible = false;
                    }
                    else
                    {
                        GridView1.Visible = true;
                        GridView2.Visible = false;
                    }
                }


here i want to make an easy and proper way to handle my requirements please help me