Reflection, C# - rextester

Language: Layout:

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Reflection;

namespace Rextester
{
    public class Company
    {
        public object this[string propertyName] 
        {
            get{
                Type myType = typeof(Company);                   
                PropertyInfo myPropInfo = myType.GetProperty(propertyName);
                return myPropInfo.GetValue(this, null);
            }
            set{
                Type myType = typeof(Company);                   
                PropertyInfo myPropInfo = myType.GetProperty(propertyName);
                myPropInfo.SetValue(this, value, null);
            }

}

public int Id { get; set; }
        public string Name { get; set; }
        public string CompanyAddress1 { get; set; }
        public string CompanyPostCode { get; set; }
        public string CompanyCity { get; set; }
        public string CompanyCounty { get; set; }
    }
    
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            List<Company> myList = new List<Company>();
            myList.Add(new Company(){ Id = 1, Name = "Some1", CompanyAddress1 = "Foo1", CompanyCounty = "USA"});
            myList.Add(new Company(){ Id = 2, Name = "Some2", CompanyAddress1 = "Foo2", CompanyCounty = "USA"});
            myList.Add(new Company(){ Id = 3, Name = "Some3", CompanyAddress1 = "Foo3", CompanyCounty = "USA"});
            myList.Add(new Company(){ Id = 4, Name = "Some4", CompanyAddress1 = "Foo4", CompanyCounty = "CANADA"});
            myList.Add(new Company(){ Id = 5, Name = "Some5", CompanyAddress1 = "Foo5", CompanyCounty = "CANADA"});
            myList.Add(new Company(){ Id = 6, Name = "Some6", CompanyAddress1 = "Foo6", CompanyCounty = "CANADA"});
            
            var result = FilterCompanies(myList, "CompanyCounty", "USA");
            foreach(var c in result) {
                Console.WriteLine(string.Format("ID {0}, Name = {1}, CompanyCounty = {2}", c.Id, c.Name, c.CompanyCounty));
            }
            
        }
        
        public static List<Company> FilterCompanies(List<Company> unfilteredList, string key, string query)
        {
            // linq  version what ideally would like to archeve
            return unfilteredList.Where(x => x[key].ToString().ToLower().Contains(query.ToLower())).ToList();
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,17 sec, absolute running time: 0,09 sec, cpu time: 0,11 sec, average memory usage: 13 Mb, average nr of threads: 3