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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | using System; namespace Axios.Engine { public abstract class Singleton<T> where T: new () { private static T instance; private static object syncRoot = new Object(); public static T Instance { get { if (instance == null ) { lock (syncRoot) { if (instance == null ) instance = new T(); } } return instance; } } } } |