private void CreateEmployee_button_Click(object sender, EventArgs e) { var employeeInfo = new Employee { FirstName = Name_textbox.Text, LastName = Surnname_textbox.Text, Phone = Phone_textbox.Text, Description = Details_textbox.Text }; ; if (!EmployeeValidator.ValidateFirstOrSecondName(employeeInfo.FirstName)) { NameErrorProvider.SetError(Name_textbox, "Name is not correct."); } if (!EmployeeValidator.ValidateFirstOrSecondName(employeeInfo.LastName)) { SecondNameErrorProvider.SetError(Surnname_textbox, "Second name is not correct."); } if (!EmployeeValidator.ValidatePhoneNumber(employeeInfo.Phone, true)) { PhoneNumberErrorProvider.SetError(Phone_textbox, $"Phone number is not correct.{Environment.NewLine}It should contain 10 digits."); } if (EmployeeValidator.IsValidClientInfo(employeeInfo)) { EmployeeHelper.InsertEmployeeInfo(employeeInfo); ClearForm(); MessageLabel.Show(); MessageLabel.Text = "Client info was successfully saved!"; //Thread.Sleep(2000);//queeck dummy way))) TODO: change! //MessageLabel.Text = string.Empty; } }