HoHCI-BikeSteering/Assets/schoenlogger/Scripts/Singleton.cs

using System;
using UnityEngine;

namespace SchoenLogger
{
    public abstract class Singleton<T> : MonoBehaviour where T : MonoBehaviour
    {
        private static readonly Lazy<T> LazyInstance = new Lazy<T>(CreateSingleton);

        public static T Instance => LazyInstance.Value;

        private static T CreateSingleton()
        {
            var ownerObject = new GameObject($"{typeof(T).Name} (singleton)");
            var instance = ownerObject.AddComponent<T>();
            DontDestroyOnLoad(ownerObject);
            return instance;
        }
    }
}