new user method in c# create new user and comparison for two textbox

I have to do a form for new user in my project

I do not know what is wrong with it !!!! this is the method

private void NewUserMethod()
        {
            try
            {
            NewUserTbl newUserTbl = new NewUserTbl();
            newUserTbl.FName = txtFName.Text;
            newUserTbl.LName = txtLName.Text;
            newUserTbl.UserName = txtUserName.Text;
            newUserTbl.NewPassword = txtPass.Text;
            newUserTbl.ConfirmPassword = txtAgainPass.Text;
            txtFName.Text = "";
            txtLName.Text = "";
            txtUserName.Text = "";
            txtPass.Text = "";
            txtAgainPass.Text = "";

             if (txtPass == txtAgainPass)
            {
                DB_Admin.NewUserTbls.InsertOnSubmit(newUserTbl);
                DB_Admin.SubmitChanges();
                MessageBox.Show("new user created");
            }
            else
            {

                MessageBox.Show("Wrong Password");
            }

            }
            catch(Exception)

            {

            MessageBox.Show("You entered wrong data");
            }

I need help I'm new at c# programming!!!!