using System;

using System.Collections.Generic;

using System.Linq;

​

class Program

{

    static void Main(string[] args)

    {

        List<Key> keys = new List<Key>()

        {

            new Key { IdA = Guid.NewGuid(), IdB = Guid.NewGuid(), IdC = Guid.NewGuid() },

            new Key { IdA = Guid.NewGuid(), IdB = Guid.NewGuid(), IdC = Guid.NewGuid() },

            new Key { IdA = Guid.NewGuid(), IdB = Guid.NewGuid(), IdC = Guid.NewGuid() },

            new Key { IdA = Guid.NewGuid(), IdB = Guid.NewGuid(), IdC = Guid.NewGuid() },

        };

​

        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; }

}