如何解决“字段X永远不会分配给它，并且其默认值将为null”？ [英] How to fix "Field X is never assigned to and will have its default value null"?

问题描述

我正在尝试从控制台（街道，城市，国家/地区）输入输入，但这些字段带有下划线并显示消息（该字段从未分配给该字段，并且其值将为null）。我还创建了一个不起作用的方法SetFullAddress（如果是因为该消息，则为idk）。

I am trying to enter input from the console(street, city, country) but the fields are underlined and display the message(field is never assigned to and will have its value null). I have also created a method SetFullAddress which doesn't work(idk if it is because of that message).

Address类中的代码：

Code inside Address class:

public class Address
{
    private string street;
    private string city;
    private string country;

    public Address()
    {
        this.Street = street;
        this.City = city;
        this.Country = country;
    }

    public string Street { get; set; }
    public string City { get; set; }
    public string Country { get; set; }

    public string SetFullAddress()
    {
        return ($"Full address: {street} {city} {country}");
    }

    public void DisplayAddress()
    {
        Console.WriteLine($"Street: {Street}");
        Console.WriteLine($"City: {City}");
        Console.WriteLine($"Country: {Country}");
        Console.WriteLine(SetFullAddress());


    }

}

在Main方法内：

        Address address = new Address();
        Console.Write("Street: ");
        address.Street = Console.ReadLine();

        Console.Write("City: ");
        address.City = Console.ReadLine();

        Console.Write("Country: ");
        address.Country = Console.ReadLine();

        Console.WriteLine();
        address.DisplayAddress();

推荐答案

如果您没有遇到任何错误并且只是想要从该脚本中禁用警告，您可以使用 #pragma warning disable 0649

If you're not encountering any errors and just want to disable the warnings from that script you caa use #pragma warning disable 0649

但是请不要滥用它，这些警告可能会在以后对您有所帮助。

But don't abuse it, these warnings may help you later.

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