GHZSDKXR/Runtime/SDK/Common/Base/Singleton/Singleton.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SC.XR.Unity
{ 
    public abstract class Singleton<T> where T : class, new()
    {
        protected Singleton()
        {

        }

        private readonly static Lazy<T> instance = new Lazy<T>(() => new T());
        public static T Instance
        {
            get
            {
                return instance.Value;
            }
        }
    }
}