Avalonia/samples/RenderDemo/ViewModels/AnimationsPageViewModel.cs

using System;
using MiniMvvm;
using Avalonia.Animation;

namespace RenderDemo.ViewModels
{
    public class AnimationsPageViewModel : ViewModelBase
    {
        private bool _isPlaying = true;

        private string _playStateText = "Pause animations on this page";

        public void TogglePlayState()
        {
            PlayStateText = _isPlaying
                ? "Resume animations on this page" : "Pause animations on this page";
            _isPlaying = !_isPlaying;
        }

        public string PlayStateText
        {
            get { return _playStateText; }
            set { this.RaiseAndSetIfChanged(ref _playStateText, value); }
        }
    }
}