protected void signUpSubmitButton_Click(object sender, EventArgs e) { UserManager userManager=new UserManager(); User aUser=new User(); aUser.UserFullName = signUpFullName.Text; aUser.UserEmail = signUpEmailTextBox.Text; aUser.UserName = userName.Text; aUser.UserPassword = signUpPassword.Text; if (userManager.GetUser(aUser.UserName)!=null) { userName.BackColor = Color.Red; } else { if (userManager.InsertUser(aUser) > 0) { Response.Redirect("LoginPage.aspx"); } } }