private void SignInBtn_Click(object sender, EventArgs e) { UserName = LoginBox.Text; Password = PasswordBox.Text; if (IsLoginCorrect(UserName) && IsPasswordCorrect(Password)) { try { currentClient.Connect(); if (currentClient.SendSignInData(UserName, Password)) { fmain.IsLogin = true; fmain.UserNameLabel.Text = UserName; this.Hide(); } } catch { MessageBox.Show("Ошибка связи с сервером!"); } } }