c# - 使用 foreach 迭代对象列表

Question

我遇到了这个声明:

"When using foreach on a list of objects, the iterated object instance is not editable, but the object properties are editable"

有人可以用一个简单的例子来证明上面的内容吗？

让我重新措辞(因为我发现了两个版本的声明)，也许这个声明更清楚:

"When using foreach on a list of elements, the iteration variable that provides the element is readonly, but the element properties are editable"

Answer 1

foreach(var foo in foos)
{
  foo = null; // WRONG, foo is not editable
  foo.name = "John";  // RIGHT, foo properties are editable
}