using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        // Trying to replicate 

        /*

            var schoolsAsDictionary = schoolProv.GetByIdsAny(schoolIds).ToDictionary(s=>s.SchoolId);

            foreach (var person in persons)

            {

                var personSchools = person.OrganisationUserData.Select(s => s.SchoolId).Distinct().Select(s => schoolsAsDictionary[s]).ToArray();

            }

        */

        Dictionary<string, School> schoolsAsDictionary = new Dictionary<string, School>();

        schoolsAsDictionary.Add("s1", new School() { SchoolId = "s1", Name = "One" });

        schoolsAsDictionary.Add("s2", new School() { SchoolId = "s2", Name = "Two" });

        schoolsAsDictionary.Add("s3", new School() { SchoolId = "s3", Name = "Three" });

        schoolsAsDictionary.Add("s4", new School() { SchoolId = "s4", Name = "Four" });

        Person person = new Person();

        person.Id = "p1";

        person.Name = "Test";

        person.OrganisationUserData = new List<OrganisationUserDataItem>();

        person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s1" });

        person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s2" });

        person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s3" });

        person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s4" });

        person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s5" });

        //person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s6" });

        //person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s7" });

        //person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s8" });

        //person.OrganisationUserData.Add(new OrganisationUserDataItem() { SchoolId = "s9" });

        var personSchools = person.OrganisationUserData.Select(s => s.SchoolId).Distinct().Select(s => schoolsAsDictionary[s]).ToArray();

        /*

        Unhandled exception. System.Collections.Generic.KeyNotFoundException: The given key 's5' was not present in the dictionary.

           at System.Collections.Generic.Dictionary`2.get_Item(TKey key)

           at Program.<>c__DisplayClass0_0.<Main>b__1(String s)

           at System.Linq.Enumerable.SelectEnumerableIterator`2.ToArray()

           at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)

           at Program.Main()

        Command terminated by signal 6

        */

    }

}

​

​

​

​

public class School

{

    public string SchoolId { get; set; }

    public string Name { get; set; }

}

​

​

​

​

public class Person

{

    public string Id { get; set; }

    public string Name { get; set; }

    public List<OrganisationUserDataItem> OrganisationUserData { get; set; }

}

public class OrganisationUserDataItem

{

    public string SchoolId { get; set; }

}