小编Eri*_*ers的帖子

也许我误解了readonly结构的概念,但我认为这段代码不应该编译:

public readonly struct TwoPoints
{
    private readonly Point one;
    private readonly Point two;

    void Foo()
    {
        // compiler error:  Error CS1648  Members of readonly field 'TwoPoints.one'
        // cannot be modified (except in a constructor or a variable initializer)
        one.X = 5;

        //no compiler error! (and one is not changed)
        one.Offset(5, 5);
    }
 }

(我正在使用C#7.3.)我错过了什么？