FeedCenter/Application/MainWindow/Header.cs

using ChrisKaczor.InstalledBrowsers;
using FeedCenter.Properties;
using System.Windows;
using System.Windows.Input;

namespace FeedCenter;

public partial class MainWindow
{
    private void HandleHeaderLabelMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        // Ignore if the window is locked
        if (Settings.Default.WindowLocked)
            return;

        // Start dragging
        DragMove();
    }

    private void HandleCloseButtonClick(object sender, RoutedEventArgs e)
    {
        // Close the window
        Close();
    }

    private void HandleFeedLabelMouseDown(object sender, MouseButtonEventArgs e)
    {
        // Open the link for the current feed on a left double click
        if (e.ClickCount == 2 && e.ChangedButton == MouseButton.Left)
            InstalledBrowser.OpenLink(Settings.Default.Browser, _currentFeed.Link);
    }
}