C # 's Lazy and Lazyinitializer

1     class Program2     {3         Static voidMain (string[] args)4         {5             //Initializes a new instance of the Lazy class6             //When deferred initialization occurs, the specified initialization function and initialization mode are used7             //Parameters:8             //valuefactory:9             //called to generate a delegate that generates a deferred initialization value when needed. Ten             // One             //IsThreadSafe: A             //True if this instance can be used by more than one thread at a time, false if the instance can be used by only one thread at a time.  -Lazy<string> lazy =NewLazy<string> (() = -             { the                 returnDateTime.Now.ToLongTimeString (); -},true); -  -             //False (value not yet queried) + Console.WriteLine (lazy. isvaluecreated); - Console.WriteLine (lazy. Value); +             //true (value already queried) A Console.WriteLine (lazy. isvaluecreated); atThread.Sleep ( the); -             //value does not change after 3 seconds - Console.WriteLine (lazy. Value); -  -             stringstr =NULL; -             //use "String1." If Str is not initialized. Initialize STR inLazyinitializer.ensureinitialized (refSTR, () ="String1."); -             //output String1. to Console.WriteLine (str); +  -             //Str has been initialized, is no longer initialized, and therefore does not become "String2." theLazyinitializer.ensureinitialized (refSTR, () ="String2."); *             //output String1. $ Console.WriteLine (str);Panax Notoginseng  - console.readline (); the         } +}

C # 's Lazy and Lazyinitializer