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Editorial Team
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Asked: 2026-06-08T09:55:49+00:00

Say I have an object: public class Person { public IDictionary<string, string> RoleTypes {

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Say I have an object:

public class Person
{
   public IDictionary<string, string> RoleTypes { get; set; }
}

Where the roletypes have a name as a key and a description as a value:

  • Manager: The manager who does stuff
  • CIO: Who knows what they do
  • CEO: No one knows what they do.

So now I have say a list of People:

IEnumerable people;

I want to somehow get back from that list the person who is the CEO:

people.Single(x => x.RoleTypes.Contains("CEO"));

Well that doesn’t even compile.

Anyone know how to get it to work?

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1 Answer

  1. Editorial Team

    You have to check the keys (if the title is the key of the dictionary):

    people.Single(x => x.RoleTypes.ContainsKey("CEO"));

    That being said, this data organizational structure is odd – it would make more sense to keep the titles and descriptions separate, so they aren’t duplicated within each person. The user could maintain just a list of their titles, and the desciption of that title could be looked up elsewhere.

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