private void login_Click(object sender, EventArgs e) { string uname = username.Text; string pass = password.Text; CarDataContext c = new CarDataContext(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\adi\Documents\New folder\csms.mdf;Integrated Security=True;Connect Timeout=30"); if (uname == "" || pass == "") { MessageBox.Show("Provide Your Username and Password"); } else { var i = (from a in c.RegistationTables where a.Username == uname && a.Password == pass select a); if (i.Any()) { if (uname == "admin" && pass == "admin") { Home h = new Home(); h.Show(); Visible = false; } else { ClientView cv = new ClientView(); OrderInfo co = new OrderInfo(); cv.textBox3.Text = uname; cv.Show(); Visible = false; } } else { MessageBox.Show("Invalid Username or Password "); } } }