using System;
using System.Collections.Generic;

class AnimationTrack<T> where T : struct {
    public void Start() { Console.WriteLine("start:" + typeof(T)); }
}
interface IAnimationTrack {
    void Start();
}
class AnimationTrackAdapter<T> : IAnimationTrack where T : struct {
    public AnimationTrack<T> Track;
    public AnimationTrackAdapter(AnimationTrack<T> t) { Track = t; }
    public void Start() { Track.Start(); }
}
class AnimationClip {
    List<IAnimationTrack> tracks = new List<IAnimationTrack>();
    public void Add(IAnimationTrack t) { tracks.Add(t); }
    public void Start() { foreach (IAnimationTrack t in tracks) { t.Start(); } }
}
class Program {
    public static AnimationTrackAdapter<T> Wrap<T>(AnimationTrack<T> t) where T : struct {
        return new AnimationTrackAdapter<T>(t);
    }
    static void Main(string[] args) {
        AnimationClip c = new AnimationClip();
        c.Add(Wrap(new AnimationTrack<int>()));
        c.Add(Wrap(new AnimationTrack<float>()));
        c.Start();
    }
}