chicken_dy/Assets/TKGSDK/Common/SDKTools/NormalSingleton.cs

using System;

public abstract class NormalSingleton<T> where T : NormalSingleton<T>, new()
{
    private static T mInstance = null;
    public static T Instance
    {
        get
        {
            if (mInstance == null)
            {
                mInstance = new T();
            }

            return mInstance;
        }
    }
}