如何将内容添加到列表 [英] How do I add things to a list

问题描述

List<string> _otherList = new List<string>()
                        {
                            "carrot",
                            "banana"
                        };

在上面的代码中，我完全按照在网上找到该列表的方式初始化了一个列表.但是它表现出诸如此类的错误;预期为什么?

我的意图是希望该新列表具有一些初始值，以便可以通过在其上调用其add方法在其上添加内容，以便它不会抛出空值.


因此，我该怎么做才能用其添加方法(_otherList.add)调用此列表，以使在我调用其添加方法时不会调用此空列表或空列表.

In the above code I initialize a list exactly the same way i found this online.i mean some one put this one online. but its showing errors like ; expected why?

My intention is that I want to have this newlist to have some initial value so that I can add things on it by invoking its add method on it,so that it wont throw a null exeption.


So what do I do to invoke this list with its add method( _otherList.add) in a way that this empty or null list is not getting called when i call its add method.

推荐答案

我不确定我是否理解您的问题，但是为避免null异常，您要做的就是初始化列表:

I''m not sure I understand your question, but all you have to do to avoid the null exception is initialize the list:

public class MyClass
{
    private List<string> _otherList = new List<string>();

    public MyClass()
    {
    }
}

之后，您可以随时拨打_otherList.Add().

After that, you can call _otherList.Add() whenever you want to.

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