C＃，Unity，需要帮助来制作字典<int, class>

Question

I tried to look a bit about dictionaries and it should work,

any idea why it doesn't?

first I make a class with private properties:

using UnityEngine;
using System.Collections;

public class level
{
    private string levelTitle;
    private int moneyValue;

    public string LevelTitle
    {
        get
        {
            return levelTitle;
        }

        set
        {
            levelTitle = value;
        }
    }

    public int MoneyValue
    {
        get
        {
            return moneyValue;
        }

        set
        {
            moneyValue = value;
        }
    }

    public level(string levelTitle, int moneyValue)
    {
        this.LevelTitle = levelTitle;
        this.moneyValue = moneyValue;
    }
}

btw, in the class constructor, should I assign the private properties themself or through their get set methods?

anyway, then on another script, I make a dictionary:

public Dictionary<int, level> levels = new Dictionary<int, level>()
{
    {0, new level{"Green Field Forever", 1}},
    {1, new level{"Golden Vally", 2}}
};

which gives me a bunch of error including :

the level type argument doesn't take 0 arguments

Answer 1

use parentheses instead of curly braces, because you want to pass values to the constructor. curly braces is used for object-initializers.

new level("Green Field Forever", 1)

Another way of doing this is to use object initializer with property names that you want to set:

new level{ LevelTitle = "Green Field Forever", MoneyValue = 1}

Note: As @ken2k mentioned in comments you need a parameterless constructor to use object initializers. since you have added a constructor to your class that takes some parameters, the default constructor will be ignored. you need to add that manually like this:

public level() { }

Answer 2

new level{"Golden Vally", 2}}

should be

new level("Golden Vally", 2) }

Also have a look to C# feature called auto implemented properties that was introduced in the version 3.0 of the language that came with .Net 3.5 (so it's available in any IDE that supports this version of the language).

And generally speaking you should not set a value for the backing field associated with your property.