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      • ASP.net教程之C# static readonly 修飾符初始化變量

      • 2019-06-11 22:11 來源:未知

      同事問了一個問題,readonly和static啥區別?

      我就寫了個demo運行了下:

      復制代碼
              /***
               * 驗證初始化次數:static只初始化一次,無論多少用戶訪問,在內存中只有一份
               *              readonly每個線程初始化一次
               *              如果是接口中使用service方法,最好使用static 或者static readonly修飾符
               * 驗證修飾符初始化順序:static readonly-->static-->無修飾符-->readonly
               * */
              public object obj = new object();  //③
              public readonly object readonlyObj = new object();   //④
              public static readonly object staictReadonlyObj = new object(); //①
              public static object staictObj = new object();  //②
      
      
              // GET api/values
              public IEnumerable<string> Get()
              {
                  var o = obj.GetType();
                  var o0 = readonlyObj.GetType();
                  var o1 = staictReadonlyObj.GetType();
                  var o2 = staictObj.GetType();
      
                  return new string[] { "value1", "value2" };
              }
      復制代碼

      驗證了在多線程的情況下屬性初始化次數,以及初始化的順序。

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