using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Guid un = Guid.NewGuid();

        Guid deux = Guid.NewGuid();

        Guid trois = Guid.NewGuid();

   List<Dictionary<string, Guid>> keys = new List<Dictionary<string, Guid>>()

        {

            new Dictionary<string, Guid>() { { "idA", un }, { "idB", un  }, { "idC", un } },

            new Dictionary<string, Guid>() { { "idA", un }, { "idB", un }, { "idC", deux } },

            new Dictionary<string, Guid>() { { "idA", un }, { "idB", un }, { "idC", trois } },

            new Dictionary<string, Guid>() { { "idA", deux }, { "idB", un }, { "idC", un } }

        };

​

        string baseUrl = "https://example.com/api/data";

        string filter = string.Join(" or ", keys.Select(k => $"(idA eq {k["idA"]} and idB eq {k["idB"]} and idC eq {k["idC"]})"));

​

        UriBuilder uriBuilder = new UriBuilder(baseUrl);

        uriBuilder.Query = $"$filter={filter}";

​

        Console.WriteLine(uriBuilder.Uri);

    }

    public class Key{

        public Guid IdA {get;set;}

        public Guid IdB {get;set;}

        public Guid IdC {get;set;}

    }

}