SparkClient/LoginWindow.xaml.cs

using System.Windows;
using System.Windows.Input;

namespace SparkClient;

public partial class LoginWindow : Window
{
    public LoginWindow()
    {
        InitializeComponent();
        WindowStartupLocation = WindowStartupLocation.CenterScreen; 
    }
    private void Grid_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        if (e.ButtonState == MouseButtonState.Pressed)
        {
            this.DragMove();
        }
    }

    private void UIElement_OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        AccountTextBox.Text = string.Empty;
    }

    private void CloseButton_OnClick(object sender, RoutedEventArgs e)
    {
        this.Close();
        Environment.Exit(0);
    }
}