当你不知道将为哪个变量传递哪些参数时,如何设置构造函数[重复]

Class c1 = new(setting1: "AA", setting3: "CC");
Class c2 = new(setting2: "BB");

class Class(
    string setting1 = "A",
    string setting2 = "B",
    string setting3 = "C")
{
    public string setting1 = setting1;
    public string setting2 = setting2;
    public string setting3 = setting3;
}

如果设置是类:

Class c1 = new(setting1: new("AA"), setting3: new("CC"));
Class c2 = new(setting2: new("BB"));

class Class(
    Setting1 setting1 = default!,
    Setting2 setting2 = default!,
    Setting3 setting3 = default!)
{
    public Setting1 setting1 = setting1 ?? Setting1.Default;
    public Setting2 setting2 = setting2 ?? Setting2.Default;
    public Setting3 setting3 = setting3 ?? Setting3.Default;
}

class Setting1(string s1)
{
    public string s1 = s1;
    public static readonly Setting1 Default = new("A");
}

class Setting2(string s2)
{
    public string s2 = s2;
    public static readonly Setting2 Default = new("B");
}

class Setting3(string s3)
{
    public string s3 = s3;
    public static readonly Setting3 Default = new("C");
}