在内部静态类的静态方法变量 [英] variable in static methods inside static class

问题描述

请考虑此code：

1)public static class MyClass
2){
3)    public static DateTime MyMethod(DateTime dt)
4)    {
5)         DateTime temp = new DateTime();
6)         temp = dt.AddDays(1);
7)         return temp;
8)    }
9)}

确实温度变量例如每任何调用的MyMethod ？或者是因为它是在内部静态类温度变量只有一个实例的静态方法分配内存？

Does temp variable has instance per any calls to MyMethod? or because it is in a static method inside static class just one instance of temp variable allocate in memory?

感谢

推荐答案

温度既不是静态的，也不是一个实例变量，它是一个的本地变量。它完全没有关系的声明它的方法是静态的还是不：变量的作用域开始在其声明的位置，并结束于右花括号} 的范围中声明它。每一个执行线程经过的MyMethod 都有自己的温度，拷贝是不可见的变量的范围之内的任何地方。

temp is neither a static nor an instance variable, it is a local variable. It absolutely does not matter whether the method in which it is declared is static or not: the variable's scope starts at the point of its declaration, and ends at the closing curly brace } of the scope in which it is declared. Each executing thread that goes through MyMethod gets its own copy of temp, which is invisible anywhere outside the variable's scope.

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