是否可以创建一个字典，其中的值可以具有多种数据类型？ （另外我如何遍历一个数组作为我的值之一）

Question

How do I iterate through profile["Names"] in this scenario?

using System.Collections.Generic;

        Dictionary<object, object> profile = new Dictionary<object, object>();
        profile.Add("Names", new string[]{"Joel", "Sean"});
        profile.Add("Ethnicity", "Asian");
        profile.Add("Language", "English");

        for (int i = 0; i < profile["Names"].length; i ++)
        {
            System.Console.WriteLine($"Name: {i}");
        }
       Console.WriteLine("Ethnicity - " + profile["Ethnicity"]);
       Console.WriteLine("Language - " + profile["Language"]);

Answer 1

You can use this where the key of the dictionary is type of string.

We need to cast the value object into string array when you know it is that.

Dictionary<string, object> profile = new Dictionary<string, object>();
profile.Add("Names", new string[] { "Joel", "Sean" });
profile.Add("Ethnicity", "Asian");
profile.Add("Language", "English");

var names = (string[])profile["Names"];
for ( int i = 0; i < names.Length; i++ )
{
  Console.WriteLine($"Name: {names[i]}");
}
Console.WriteLine("Ethnicity - " + profile["Ethnicity"]);
Console.WriteLine("Language - " + profile["Language"]);

But you should consider to rethink your design because the actual is not very clean not stringly typed.

Perhaps:

using System.Collections.Generics;

public class Profile
{
  public string Name { get; set; }
  public string Ethnicity { get; set; }
  public string Language { get; set; }
  public Profile(string name, string ethnicity, string language)
  {
    Name = name;
    Ethnicity = ethnicity;
    Language = language;
  }
}

var profiles = new List<Profile>();
profiles.Add(new Profile("Joel", "Asian", "English"));
profiles.Add(new Profile("Sean", "Asian", "English"));

foreach ( var item in profiles )
{
  Console.WriteLine("Name: " + item.Name);
  Console.WriteLine("Ethnicity: " + item.Ethnicity);
  Console.WriteLine("Language: " + item.Language);
  Console.WriteLine();
}

You can also use enums or lookup collections instead of string for ethnicity and language:

enum Ethnicity
{
  Asian,
  Caucasian
}

enum Language
{
  English,
  French
}

Now a profile can be:

public class Profile
{
  public string Name { get; set; }
  public Ethnicity Ethnicity { get; set; }
  public Language Language { get; set; }
  public Profile(string name, Ethnicity ethnicity, Language language)
  {
    Name = name;
    Ethnicity = ethnicity;
    Language = language;
  }
}

Used like that:

var profiles = new List<Profile>();
profiles.Add(new Profile("Joel", Ethnicity.Asian, Language.English));
profiles.Add(new Profile("Sean", Ethnicity.Asian, Language.English));

foreach ( var item in profiles )
{
  Console.WriteLine("Name: " + item.Name);
  Console.WriteLine("Ethnicity: " + item.Ethnicity);
  Console.WriteLine("Language: " + item.Language);
  Console.WriteLine();
}