Untitled

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media.Imaging;

namespace YourNamespace
{
    public partial class PostControl : UserControl
    {
        private bool isLiked = false;

        public string ImagePath { get; set; }
        public string HeartEmptyPath { get; set; } = @"C:\Path\To\EmptyHeart.png";
        public string HeartFilledPath { get; set; } = @"C:\Path\To\FilledHeart.png";
        public string SendButtonPath { get; set; } = @"C:\Path\To\SendButton.png";

        public PostControl()
        {
            InitializeComponent();
            HeartImage.Source = new BitmapImage(new Uri(HeartEmptyPath, UriKind.Absolute));
            SendButtonImage.Source = new BitmapImage(new Uri(SendButtonPath, UriKind.Absolute));
        }

        public void SetPostImage(string path)
        {
            ImagePath = path;
            PostImage.Source = new BitmapImage(new Uri(ImagePath, UriKind.Absolute));
        }

        private void PostImage_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            ToggleHeart();
        }

        private void HeartImage_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            ToggleHeart();
        }

        private void ToggleHeart()
        {
            isLiked = !isLiked;
            HeartImage.Source = new BitmapImage(new Uri(isLiked ? HeartFilledPath : HeartEmptyPath, UriKind.Absolute));
        }
    }
}