WPF_Practice/PacticeSolution/ResourceSample/MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace ResourceSample
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        int _clickCount = 0;
        private void btnDynamic_Click(object sender, RoutedEventArgs e)
        {
            if (_clickCount % 2 == 0)
                this.Resources["CustomEventColor"] = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#3de385"));
            else
                this.Resources["CustomEventColor"] = Application.Current.FindResource("CustomRed");

            _clickCount++;
        }
    }
}