urho3d.UrhoSharp/ProjectTemplates/VisualStudio/UrhoSharp/MyGame.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Urho;
using Urho.Gui;
using Urho.Actions;
using Urho.Shapes;

namespace $safeprojectname$
{
    public class MyGame : Application
    {
        public MyGame() : base(new ApplicationOptions { })
        {
        }

        protected override void Start()
        {
            CreateScene();

            // Subscribe to Esc key:
            Input.SubscribeToKeyDown(args => { if (args.Key == Key.Esc) Engine.Exit(); });
        }

        async void CreateScene()
        {
            // UI text 
            var helloText = new Text(Context);
            helloText.Value = "Hello World from UrhoSharp";
            helloText.HorizontalAlignment = HorizontalAlignment.Center;
            helloText.VerticalAlignment = VerticalAlignment.Top;
            helloText.SetColor(new Color(r: 0f, g: 1f, b: 1f));
            helloText.SetFont(font: ResourceCache.GetFont("Fonts/Font.ttf"), size: 30);
            UI.Root.AddChild(helloText);

            // 3D scene with Octree
            var scene = new Scene(Context);
            scene.CreateComponent<Octree>();

            // Box	
            Node boxNode = scene.CreateChild(name: "Box node");
            boxNode.Position = new Vector3(x: 0, y: 0, z: 5);
            boxNode.SetScale(0f);
            boxNode.Rotation = new Quaternion(x: 60, y: 0, z: 30);

            StaticModel boxModel = boxNode.CreateComponent<StaticModel>();
            boxModel.Model = ResourceCache.GetModel("Models/Box.mdl");
            boxModel.SetMaterial(ResourceCache.GetMaterial("Materials/BoxMaterial.xml"));
            
            // Light
            Node lightNode = scene.CreateChild(name: "light");
            var light = lightNode.CreateComponent<Light>();
            light.Range = 10;
            light.Brightness = 1.5f;

            // Camera
            Node cameraNode = scene.CreateChild(name: "camera");
            Camera camera = cameraNode.CreateComponent<Camera>();

            // Viewport
            Renderer.SetViewport(0, new Viewport(Context, scene, camera, null));

            // Do actions
            await boxNode.RunActionsAsync(new EaseBounceOut(new ScaleTo(duration: 1f, scale: 1)));
            await boxNode.RunActionsAsync(new RepeatForever(
                new RotateBy(duration: 1, deltaAngleX: 90, deltaAngleY: 0, deltaAngleZ: 0)));
        }
    }
}