using System;

using System.Linq;

using System.Collections.Generic;

public class DynamicParam

{

    public string Name {get;set;}

    public string Value {get;set;}

}

public class Program

{

    public static void Main()

    {

        List<DynamicParam> dynParams = new List<DynamicParam>();

        dynParams.Add(new DynamicParam { Name = "PNR", Value = "ABC123" });

        dynParams.Add(new DynamicParam { Name = "OriginCity", Value = "Houston" });

        var arrivalParam = dynParams.FirstOrDefault(p => p.Name == "DestCity");

                    if (arrivalParam != null && !string.IsNullOrEmpty(arrivalParam.Name))

                    {

                       if(dynParams.Find(x => x.Name == "OriginCity").Value == "Houston")

                            Console.WriteLine("Houston Found!");

                        else 

                            Console.WriteLine("Houston NOT Found!");

                    }

    }

}