Linq

namespace WizardGuild {
    using System.Linq;
    using static System.Console;
    
    class MainClass {
        static void Main() {
            var wizards = WizardRetriever.Get();
            
            var gandalf = wizards.FirstOrDefault(x => x.Name.Equals("Gandalf the Grey"));
            
            WriteLine(gandalf.Name);
        }
    }
}