private void Button_News_Click(object sender, RoutedEventArgs e)
        {
            SomeCategory.currentCategory = "News";
            SomeBorderColor.currentColor = Brushes.Red;
            this.Hide();
            MainWindow_Category_User sistema = new MainWindow_Category_User();

            sistema.ShowDialog();
            this.Close();
        }
        private void Button_Opinion_Click(object sender, RoutedEventArgs e)
        {
            Label_Category.Content       = "Opinion";
            SomeCategory.currentCategory = "Opinion";
            SomeBorderColor.currentColor = Brushes.DarkGreen;
            this.Hide();
            MainWindow_Category_User sistema = new MainWindow_Category_User();

            sistema.ShowDialog();
            this.Close();
        }
        private void Button_Entertainment_Click(object sender, RoutedEventArgs e)
        {
            SomeCategory.currentCategory = "Entertainment";
            SomeBorderColor.currentColor = Brushes.DarkOrange;

            this.Hide();
            MainWindow_Category_User sistema = new MainWindow_Category_User();

            sistema.ShowDialog();
            this.Close();
        }