using System;
using System.Linq;
using System.Collections.Generic;
 
class Vehicles {
            public string VehId { get; set; }
            public string VehName { get; set; }
        }
public class Test
{
	public static void Main()
	{
	    List<Vehicles> vehicles = new List<Vehicles>() { 
                new Vehicles(){VehId="LOR",VehName="Lorry"},
                new Vehicles(){VehId="CAR",VehName="Car"},
                new Vehicles(){VehId="BOA",VehName="Boat"},
                new Vehicles(){VehId="PLN",VehName="Plane"},
            };
            var ordered = vehicles
                .OrderBy(v => v.VehId == "PLN" || v.VehId == "CAR")
                .ThenBy(v => v.VehName);
            Console.WriteLine(string.Join(", ", ordered.Select(v => v.VehId + " "+ v.VehName).ToArray()));
	}
}

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